作者: EricHu 出处: http://blog.csdn.net/chinahuyong
1、原生JavaScript实现字符串长度截取
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- function cutstr(str, len) {
- var temp;
- var icount = 0;
- var patrn = /[^\x00-\xff]/;
- var strre = "";
- for (var i = 0; i < str.length; i++) {
- if (icount < len - 1) {
- temp = str.substr(i, 1);
- if (patrn.exec(temp) == null) {
- icount = icount + 1
- } else {
- icount = icount + 2
- }
- strre += temp
- } else {
- break
- }
- }
- return strre + "..."
- }
2、原生JavaScript获取域名主机
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- function getHost(url) {
- var host = "null";
- if(typeof url == "undefined"|| null == url) {
- url = window.location.href;
- }
- var regex = /^\w+\:\/\/([^\/]*).*/;
- var match = url.match(regex);
- if(typeof match != "undefined" && null != match) {
- host = match[1];
- }
- return host;
- }
3、原生JavaScript清除空格
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- String.prototype.trim = function() {
- var reExtraSpace = /^\s*(.*?)\s+$/;
- return this.replace(reExtraSpace, "$1")
- }
4、原生JavaScript替换全部
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- String.prototype.replaceAll = function(s1, s2) {
- return this.replace(new RegExp(s1, "gm"), s2)
- }
5、原生JavaScript转义html标签
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- function HtmlEncode(text) {
- return text.replace(/&/g, ‘&‘).replace(/\"/g, ‘"‘).replace(/</g, ‘<‘).replace(/>/g, ‘>‘)
- }
6、原生JavaScript还原html标签
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- function HtmlDecode(text) {
- return text.replace(/&/g, ‘&‘).replace(/"/g, ‘\"‘).replace(/</g, ‘<‘).replace(/>/g, ‘>‘)
- }
7、原生JavaScript时间日期格式转换
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- Date.prototype.Format = function(formatStr) {
- var str = formatStr;
- var Week = [‘日‘, ‘一‘, ‘二‘, ‘三‘, ‘四‘, ‘五‘, ‘六‘];
- str = str.replace(/yyyy|YYYY/, this.getFullYear());
- str = str.replace(/yy|YY/, (this.getYear() % 100) > 9 ? (this.getYear() % 100).toString() : ‘0‘ + (this.getYear() % 100));
- str = str.replace(/MM/, (this.getMonth() + 1) > 9 ? (this.getMonth() + 1).toString() : ‘0‘ + (this.getMonth() + 1));
- str = str.replace(/M/g, (this.getMonth() + 1));
- str = str.replace(/w|W/g, Week[this.getDay()]);
- str = str.replace(/dd|DD/, this.getDate() > 9 ? this.getDate().toString() : ‘0‘ + this.getDate());
- str = str.replace(/d|D/g, this.getDate());
- str = str.replace(/hh|HH/, this.getHours() > 9 ? this.getHours().toString() : ‘0‘ + this.getHours());
- str = str.replace(/h|H/g, this.getHours());
- str = str.replace(/mm/, this.getMinutes() > 9 ? this.getMinutes().toString() : ‘0‘ + this.getMinutes());
- str = str.replace(/m/g, this.getMinutes());
- str = str.replace(/ss|SS/, this.getSeconds() > 9 ? this.getSeconds().toString() : ‘0‘ + this.getSeconds());
- str = str.replace(/s|S/g, this.getSeconds());
- return str
- }
8、原生JavaScript判断是否为数字类型
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- function isDigit(value) {
- var patrn = /^[0-9]*$/;
- if (patrn.exec(value) == null || value == "") {
- return false
- } else {
- return true
- }
- }
9、原生JavaScript设置cookie值
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- function setCookie(name, value, Hours) {
- var d = new Date();
- var offset = 8;
- var utc = d.getTime() + (d.getTimezoneOffset() * 60000);
- var nd = utc + (3600000 * offset);
- var exp = new Date(nd);
- exp.setTime(exp.getTime() + Hours * 60 * 60 * 1000);
- document.cookie = name + "=" + escape(value) + ";path=/;expires=" + exp.toGMTString() + ";domain=360doc.com;"
- }
10、原生JavaScript获取cookie值
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- function getCookie(name) {
- var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));
- if (arr != null) return unescape(arr[2]);
- return null
- }
11、原生JavaScript加入收藏夹
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- function AddFavorite(sURL, sTitle) {
- try {
- window.external.addFavorite(sURL, sTitle)
- } catch(e) {
- try {
- window.sidebar.addPanel(sTitle, sURL, "")
- } catch(e) {
- alert("加入收藏失败,请使用Ctrl+D进行添加")
- }
- }
- }
12、原生JavaScript设为首页
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- function setHomepage() {
- if (document.all) {
- document.body.style.behavior = ‘url(#default#homepage)‘;
- document.body.setHomePage(‘http://‘)
- } else if (window.sidebar) {
- if (window.netscape) {
- try {
- netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect")
- } catch(e) {
- alert("该操作被浏览器拒绝,如果想启用该功能,请在地址栏内输入 about:config,然后将项 signed.applets.codebase_principal_support 值该为true")
- }
- }
- var prefs = Components.classes[‘@mozilla.org/preferences-service;1‘].getService(Components.interfaces.nsIPrefBranch);
- prefs.setCharPref(‘browser.startup.homepage‘, ‘http://‘)
- }
- }
13、原生JavaScript判断IE6
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- var ua = navigator.userAgent.toLowerCase();
- var isIE6 = ua.indexOf("msie 6") > -1;
- if (isIE6) {
- try {
- document.execCommand("BackgroundImageCache", false, true)
- } catch(e) {}
- }
14、原生JavaScript加载样式文件
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- function LoadStyle(url) {
- try {
- document.createStyleSheet(url)
- } catch(e) {
- var cssLink = document.createElement(‘link‘);
- cssLink.rel = ‘stylesheet‘;
- cssLink.type = ‘text/css‘;
- cssLink.href = url;
- var head = document.getElementsByTagName(‘head‘)[0];
- head.appendChild(cssLink)
- }
- }
15、原生JavaScript返回脚本内容
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- function evalscript(s) {
- if(s.indexOf(‘<script‘) == -1) return s;
- var p = /<script[^\>]*?>([^\x00]*?)<\/script>/ig;
- var arr = [];
- while(arr = p.exec(s)) {
- var p1 = /<script[^\>]*?src=\"([^\>]*?)\"[^\>]*?(reload=\"1\")?(?:charset=\"([\w\-]+?)\")?><\/script>/i;
- var arr1 = [];
- arr1 = p1.exec(arr[0]);
- if(arr1) {
- appendscript(arr1[1], ‘‘, arr1[2], arr1[3]);
- } else {
- p1 = /<script(.*?)>([^\x00]+?)<\/script>/i;
- arr1 = p1.exec(arr[0]);
- appendscript(‘‘, arr1[2], arr1[1].indexOf(‘reload=‘) != -1);
- }
- }
- return s;
- }
16、原生JavaScript清除脚本内容
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- function stripscript(s) {
- return s.replace(/<script.*?>.*?<\/script>/ig, ‘‘);
- }
17、原生JavaScript动态加载脚本文件
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- function appendscript(src, text, reload, charset) {
- var id = hash(src + text);
- if(!reload && in_array(id, evalscripts)) return;
- if(reload && $(id)) {
- $(id).parentNode.removeChild($(id));
- }
- evalscripts.push(id);
- var scriptNode = document.createElement("script");
- scriptNode.type = "text/javascript";
- scriptNode.id = id;
- scriptNode.charset = charset ? charset : (BROWSER.firefox ? document.characterSet : document.charset);
- try {
- if(src) {
- scriptNode.src = src;
- scriptNode.onloadDone = false;
- scriptNode.onload = function () {
- scriptNode.onloadDone = true;
- JSLOADED[src] = 1;
- };
- scriptNode.onreadystatechange = function () {
- if((scriptNode.readyState == ‘loaded‘ || scriptNode.readyState == ‘complete‘) && !scriptNode.onloadDone) {
- scriptNode.onloadDone = true;
- JSLOADED[src] = 1;
- }
- };
- } else if(text){
- scriptNode.text = text;
- }
- document.getElementsByTagName(‘head‘)[0].appendChild(scriptNode);
- } catch(e) {}
- }
18、原生JavaScript返回按ID检索的元素对象
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- function $(id) {
- return !id ? null : document.getElementById(id);
- }
19、原生JavaScript返回浏览器版本内容
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- function browserVersion(types) {
- var other = 1;
- for(i in types) {
- var v = types[i] ? types[i] : i;
- if(USERAGENT.indexOf(v) != -1) {
- var re = new RegExp(v + ‘(\\/|\\s)([\\d\\.]+)‘, ‘ig‘);
- var matches = re.exec(USERAGENT);
- var ver = matches != null ? matches[2] : 0;
- other = ver !== 0 && v != ‘mozilla‘ ? 0 : other;
- }else {
- var ver = 0;
- }
- eval(‘BROWSER.‘ + i + ‘= ver‘);
- }
- BROWSER.other = other;
- }
20、原生JavaScript元素显示的通用方法
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- function $(id) {
- return !id ? null : document.getElementById(id);
- }
- function display(id) {
- var obj = $(id);
- if(obj.style.visibility) {
- obj.style.visibility = obj.style.visibility == ‘visible‘ ? ‘hidden‘ : ‘visible‘;
- } else {
- obj.style.display = obj.style.display == ‘‘ ? ‘none‘ : ‘‘;
- }
- }
21、原生JavaScript中有insertBefore方法,可惜却没有insertAfter方法?用如下函数实现
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- function insertAfter(newChild,refChild){
- var parElem=refChild.parentNode;
- if(parElem.lastChild==refChild){
- refChild.appendChild(newChild);
- }else{
- parElem.insertBefore(newChild,refChild.nextSibling);
- }
- }
22、原生JavaScript中兼容浏览器绑定元素事件
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- function addEventSamp(obj,evt,fn){
- if (obj.addEventListener) {
- obj.addEventListener(evt, fn, false);
- }else if(obj.attachEvent){
- obj.attachEvent(‘on‘+evt,fn);
- }
- }
23、原生JavaScript光标停在文字的后面,文本框获得焦点时调用
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- function focusLast(){
- var e = event.srcElement;
- var r =e.createTextRange();
- r.moveStart(‘character‘,e.value.length);
- r.collapse(true);
- r.select();
- }
24、原生JavaScript检验URL链接是否有效
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- function getUrlState(URL){
- var xmlhttp = new ActiveXObject("microsoft.xmlhttp");
- xmlhttp.Open("GET",URL, false);
- try{
- xmlhttp.Send();
- }catch(e){
- }finally{
- var result = xmlhttp.responseText;
- if(result){
- if(xmlhttp.Status==200){
- return(true);
- }else{
- return(false);
- }
- }else{
- return(false);
- }
- }
- }
25、原生JavaScript格式化CSS样式代码
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- function formatCss(s){//格式化代码
- s = s.replace(/\s*([\{\}\:\;\,])\s*/g, "$1");
- s = s.replace(/;\s*;/g, ";"); //清除连续分号
- s = s.replace(/\,[\s\.\#\d]*{/g, "{");
- s = s.replace(/([^\s])\{([^\s])/g, "$1 {\n\t$2");
- s = s.replace(/([^\s])\}([^\n]*)/g, "$1\n}\n$2");
- s = s.replace(/([^\s]);([^\s\}])/g, "$1;\n\t$2");
- return s;
- }
26、原生JavaScript压缩CSS样式代码
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- function yasuoCss (s) {//压缩代码
- s = s.replace(/\/\*(.|\n)*?\*\//g, ""); //删除注释
- s = s.replace(/\s*([\{\}\:\;\,])\s*/g, "$1");
- s = s.replace(/\,[\s\.\#\d]*\{/g, "{"); //容错处理
- s = s.replace(/;\s*;/g, ";"); //清除连续分号
- s = s.match(/^\s*(\S+(\s+\S+)*)\s*$/); //去掉首尾空白
- return (s == null) ? "" : s[1];
- }
27、原生JavaScript获取当前路径
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- var currentPageUrl = "";
- if (typeof this.href === "undefined") {
- currentPageUrl = document.location.toString().toLowerCase();
- }
- else {
- currentPageUrl = this.href.toString().toLowerCase();
- }
28、原生JavaScriptIP转成整型
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- function _ip2int(ip){
- var num = 0;
- ip = ip.split(".");
- num = Number(ip[0]) * 256 * 256 * 256 + Number(ip[1]) * 256 * 256 + Number(ip[2]) * 256 + Number(ip[3]);
- num = num >>> 0;
- return num;
- }
29、原生JavaScript整型解析为IP地址
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- function _int2iP(num){
- var str;
- var tt = new Array();
- tt[0] = (num >>> 24) >>> 0;
- tt[1] = ((num << 8) >>> 24) >>> 0;
- tt[2] = (num << 16) >>> 24;
- tt[3] = (num << 24) >>> 24;
- str = String(tt[0]) + "." + String(tt[1]) + "." + String(tt[2]) + "." + String(tt[3]);
- return str;
- }
30、原生JavaScript实现checkbox全选与全不选
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- function checkAll() {
- var selectall = document.getElementById("selectall");
- var allbox = document.getElementsByName("allbox");
- if (selectall.checked) {
- for (var i = 0; i < allbox.length; i++) {
- allbox[i].checked = true;
- }
- } else {
- for (var i = 0; i < allbox.length; i++) {
- allbox[i].checked = false;
- }
- }
- }
(31~40)移动篇
31、原生JavaScript判断是否移动设备
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- function isMobile(){
- if (typeof this._isMobile === ‘boolean‘){
- return this._isMobile;
- }
- var screenWidth = this.getScreenWidth();
- var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport;
- var fixViewPortsExperimentRunning = fixViewPortsExperiment && (fixViewPortsExperiment.toLowerCase() === "new");
- if(!fixViewPortsExperiment){
- if(!this.isAppleMobileDevice()){
- screenWidth = screenWidth/window.devicePixelRatio;
- }
- }
- var isMobileScreenSize = screenWidth < 600;
- var isMobileUserAgent = false;
- this._isMobile = isMobileScreenSize && this.isTouchScreen();
- return this._isMobile;
- }
32、原生JavaScript判断是否移动设备访问
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- function isMobileUserAgent(){
- return (/iphone|ipod|android.*mobile|windows.*phone|blackberry.*mobile/i.test(window.navigator.userAgent.toLowerCase()));
- }
33、原生JavaScript判断是否苹果移动设备访问
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- function isAppleMobileDevice(){
- return (/iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase()));
- }
34、原生JavaScript判断是否安卓移动设备访问
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- function isAndroidMobileDevice(){
- return (/android/i.test(navigator.userAgent.toLowerCase()));
- }
35、原生JavaScript判断是否Touch屏幕
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- function isTouchScreen(){
- return ((‘ontouchstart‘ in window) || window.DocumentTouch && document instanceof DocumentTouch);
- }
36、原生JavaScript判断是否在安卓上的谷歌浏览器
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- function isNewChromeOnAndroid(){
- if(this.isAndroidMobileDevice()){
- var userAgent = navigator.userAgent.toLowerCase();
- if((/chrome/i.test(userAgent))){
- var parts = userAgent.split(‘chrome/‘);
- var fullVersionString = parts[1].split(" ")[0];
- var versionString = fullVersionString.split(‘.‘)[0];
- var version = parseInt(versionString);
- if(version >= 27){
- return true;
- }
- }
- }
- return false;
- }
37、原生JavaScript判断是否打开视窗
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- function isViewportOpen() {
- return !!document.getElementById(‘wixMobileViewport‘);
- }
38、原生JavaScript获取移动设备初始化大小
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- function getInitZoom(){
- if(!this._initZoom){
- var screenWidth = Math.min(screen.height, screen.width);
- if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){
- screenWidth = screenWidth/window.devicePixelRatio;
- }
- this._initZoom = screenWidth /document.body.offsetWidth;
- }
- return this._initZoom;
- }
39、原生JavaScript获取移动设备最大化大小
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- function getZoom(){
- var screenWidth = (Math.abs(window.orientation) === 90) ? Math.max(screen.height, screen.width) : Math.min(screen.height, screen.width);
- if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){
- screenWidth = screenWidth/window.devicePixelRatio;
- }
- var FixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport;
- var FixViewPortsExperimentRunning = FixViewPortsExperiment && (FixViewPortsExperiment === "New" || FixViewPortsExperiment === "new");
- if(FixViewPortsExperimentRunning){
- return screenWidth / window.innerWidth;
- }else{
- return screenWidth / document.body.offsetWidth;
- }
- }
40、原生JavaScript获取移动设备屏幕宽度
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- function getScreenWidth(){
- var smallerSide = Math.min(screen.width, screen.height);
- var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport;
- var fixViewPortsExperimentRunning = fixViewPortsExperiment && (fixViewPortsExperiment.toLowerCase() === "new");
- if(fixViewPortsExperiment){
- if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){
- smallerSide = smallerSide/window.devicePixelRatio;
- }
- }
- return smallerSide;
- }
41、原生JavaScript完美判断是否为网址
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- function IsURL(strUrl) {
- var regular = /^\b(((https?|ftp):\/\/)?[-a-z0-9]+(\.[-a-z0-9]+)*\.(?:com|edu|gov|int|mil|net|org|biz|info|name|museum|asia|coop|aero|[a-z][a-z]|((25[0-5])|(2[0-4]\d)|(1\d\d)|([1-9]\d)|\d))\b(\/[-a-z0-9_:\@&?=+,.!\/~%\$]*)?)$/i
- if (regular.test(strUrl)) {
- return true;
- }
- else {
- return false;
- }
- }
42、原生JavaScript根据样式名称检索元素对象
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- function getElementsByClassName(name) {
- var tags = document.getElementsByTagName(‘*‘) || document.all;
- var els = [];
- for (var i = 0; i < tags.length; i++) {
- if (tags[i].className) {
- var cs = tags[i].className.split(‘ ‘);
- for (var j = 0; j < cs.length; j++) {
- if (name == cs[j]) {
- els.push(tags[i]);
- break
- }
- }
- }
- }
- return els
- }
43、原生JavaScript判断是否以某个字符串开头
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- String.prototype.startWith = function (s) {
- return this.indexOf(s) == 0
- }
44、原生JavaScript判断是否以某个字符串结束
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- String.prototype.endWith = function (s) {
- var d = this.length - s.length;
- return (d >= 0 && this.lastIndexOf(s) == d)
- }
45、原生JavaScript返回IE浏览器的版本号
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- function getIE(){
- if (window.ActiveXObject){
- var v = navigator.userAgent.match(/MSIE ([^;]+)/)[1];
- return parseFloat(v.substring(0, v.indexOf(".")))
- }
- return false
- }
46、原生JavaScript获取页面高度
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- function getPageHeight(){
- var g = document, a = g.body, f = g.documentElement, d = g.compatMode == "BackCompat"
- ? a
- : g.documentElement;
- return Math.max(f.scrollHeight, a.scrollHeight, d.clientHeight);
- }
47、原生JavaScript获取页面scrollLeft
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- function getPageScrollLeft(){
- var a = document;
- return a.documentElement.scrollLeft || a.body.scrollLeft;
- }
48、原生JavaScript获取页面可视宽度
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- function getPageViewWidth(){
- var d = document, a = d.compatMode == "BackCompat"
- ? d.body
- : d.documentElement;
- return a.clientWidth;
- }
49、原生JavaScript获取页面宽度
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- function getPageWidth(){
- var g = document, a = g.body, f = g.documentElement, d = g.compatMode == "BackCompat"
- ? a
- : g.documentElement;
- return Math.max(f.scrollWidth, a.scrollWidth, d.clientWidth);
- }
50、原生JavaScript获取页面scrollTop
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- function getPageScrollTop(){
- var a = document;
- return a.documentElement.scrollTop || a.body.scrollTop;
- }
51、原生JavaScript获取页面可视高度
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- function getPageViewHeight() {
- var d = document, a = d.compatMode == "BackCompat"
- ? d.body
- : d.documentElement;
- return a.clientHeight;
- }
52、原生JavaScript跨浏览器添加事件
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- function addEvt(oTarget,sEvtType,fnHandle){
- if(!oTarget){return;}
- if(oTarget.addEventListener){
- oTarget.addEventListener(sEvtType,fnHandle,false);
- }else if(oTarget.attachEvent){
- oTarget.attachEvent("on" + sEvtType,fnHandle);
- }else{
- oTarget["on" + sEvtType] = fnHandle;
- }
- }
53、原生JavaScript跨浏览器删除事件
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- function delEvt(oTarget,sEvtType,fnHandle){
- if(!oTarget){return;}
- if(oTarget.addEventListener){
- oTarget.addEventListener(sEvtType,fnHandle,false);
- }else if(oTarget.attachEvent){
- oTarget.attachEvent("on" + sEvtType,fnHandle);
- }else{
- oTarget["on" + sEvtType] = fnHandle;
- }
- }
54、原生JavaScript去掉url前缀
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- function removeUrlPrefix(a){
- a=a.replace(/:/g,":").replace(/./g,".").replace(///g,"/");
- while(trim(a).toLowerCase().indexOf("http://")==0){
- a=trim(a.replace(/http:\/\//i,""));
- }
- return a;
- }
55、原生JavaScript随机数时间戳
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- function uniqueId(){
- var a=Math.random,b=parseInt;
- return Number(new Date()).toString()+b(10*a())+b(10*a())+b(10*a());
- }
56、原生JavaScript全角半角转换,iCase: 0全到半,1半到全,其他不转化
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- function chgCase(sStr,iCase){
- if(typeof sStr != "string" || sStr.length <= 0 || !(iCase === 0 || iCase == 1)){
- return sStr;
- }
- var i,oRs=[],iCode;
- if(iCase){/*半->全*/
- for(i=0; i<sStr.length;i+=1){
- iCode = sStr.charCodeAt(i);
- if(iCode == 32){
- iCode = 12288;
- }else if(iCode < 127){
- iCode += 65248;
- }
- oRs.push(String.fromCharCode(iCode));
- }
- }else{/*全->半*/
- for(i=0; i<sStr.length;i+=1){
- iCode = sStr.charCodeAt(i);
- if(iCode == 12288){
- iCode = 32;
- }else if(iCode > 65280 && iCode < 65375){
- iCode -= 65248;
- }
- oRs.push(String.fromCharCode(iCode));
- }
- }
- return oRs.join("");
- }
57、原生JavaScript确认是否键盘有效输入值
[javascript] view plaincopy
- function checkKey(iKey){
- if(iKey == 32 || iKey == 229){return true;}/*空格和异常*/
- if(iKey>47 && iKey < 58){return true;}/*数字*/
- if(iKey>64 && iKey < 91){return true;}/*字母*/
- if(iKey>95 && iKey < 108){return true;}/*数字键盘1*/
- if(iKey>108 && iKey < 112){return true;}/*数字键盘2*/
- if(iKey>185 && iKey < 193){return true;}/*符号1*/
- if(iKey>218 && iKey < 223){return true;}/*符号2*/
- return false;
- }
58、原生JavaScript获取网页被卷去的位置
[javascript] view plaincopy
- function getScrollXY() {
- return document.body.scrollTop ? {
- x: document.body.scrollLeft,
- y: document.body.scrollTop
- }: {
- x: document.documentElement.scrollLeft,
- y: document.documentElement.scrollTop
- }
- }
59、原生JavaScript另一种正则日期格式化函数+调用方法
[javascript] view plaincopy
- Date.prototype.format = function(format){ //author: meizz
- var o = {
- "M+" : this.getMonth()+1, //month
- "d+" : this.getDate(), //day
- "h+" : this.getHours(), //hour
- "m+" : this.getMinutes(), //minute
- "s+" : this.getSeconds(), //second
- "q+" : Math.floor((this.getMonth()+3)/3), //quarter
- "S" : this.getMilliseconds() //millisecond
- }
- if(/(y+)/.test(format)) format=format.replace(RegExp.$1,
- (this.getFullYear()+"").substr(4 - RegExp.$1.length));
- for(var k in o)if(new RegExp("("+ k +")").test(format))
- format = format.replace(RegExp.$1,
- RegExp.$1.length==1 ? o[k] :
- ("00"+ o[k]).substr((""+ o[k]).length));
- return format;
- }
- alert(new Date().format("yyyy-MM-dd hh:mm:ss"));
60、原生JavaScript时间个性化输出功能
[javascript] view plaincopy
- /*
- 1、< 60s, 显示为“刚刚”
- 2、>= 1min && < 60 min, 显示与当前时间差“XX分钟前”
- 3、>= 60min && < 1day, 显示与当前时间差“今天 XX:XX”
- 4、>= 1day && < 1year, 显示日期“XX月XX日 XX:XX”
- 5、>= 1year, 显示具体日期“XXXX年XX月XX日 XX:XX”
- */
- function timeFormat(time){
- var date = new Date(time)
- , curDate = new Date()
- , year = date.getFullYear()
- , month = date.getMonth() + 1
- , day = date.getDate()
- , hour = date.getHours()
- , minute = date.getMinutes()
- , curYear = curDate.getFullYear()
- , curHour = curDate.getHours()
- , timeStr;
- if(year < curYear){
- timeStr = year +‘年‘+ month +‘月‘+ day +‘日 ‘+ hour +‘:‘+ minute;
- }else{
- var pastTime = curDate - date
- , pastH = pastTime/3600000;
- if(pastH > curHour){
- timeStr = month +‘月‘+ day +‘日 ‘+ hour +‘:‘+ minute;
- }else if(pastH >= 1){
- timeStr = ‘今天 ‘ + hour +‘:‘+ minute +‘分‘;
- }else{
- var pastM = curDate.getMinutes() - minute;
- if(pastM > 1){
- timeStr = pastM +‘分钟前‘;
- }else{
- timeStr = ‘刚刚‘;
- }
- }
- }
- return timeStr;
- }
61、原生JavaScript解决offsetX兼容性问题
[javascript] view plaincopy
- // 针对火狐不支持offsetX/Y
- function getOffset(e){
- var target = e.target, // 当前触发的目标对象
- eventCoord,
- pageCoord,
- offsetCoord;
- // 计算当前触发元素到文档的距离
- pageCoord = getPageCoord(target);
- // 计算光标到文档的距离
- eventCoord = {
- X : window.pageXOffset + e.clientX,
- Y : window.pageYOffset + e.clientY
- };
- // 相减获取光标到第一个定位的父元素的坐标
- offsetCoord = {
- X : eventCoord.X - pageCoord.X,
- Y : eventCoord.Y - pageCoord.Y
- };
- return offsetCoord;
- }
- function getPageCoord(element){
- var coord = { X : 0, Y : 0 };
- // 计算从当前触发元素到根节点为止,
- // 各级 offsetParent 元素的 offsetLeft 或 offsetTop 值之和
- while (element){
- coord.X += element.offsetLeft;
- coord.Y += element.offsetTop;
- element = element.offsetParent;
- }
- return coord;
- }
62、原生JavaScript常用的正则表达式
[javascript] view plaincopy
- //正整数
- /^[0-9]*[1-9][0-9]*$/;
- //负整数
- /^-[0-9]*[1-9][0-9]*$/;
- //正浮点数
- /^(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$/;
- //负浮点数
- /^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$/;
- //浮点数
- /^(-?\d+)(\.\d+)?$/;
- //email地址
- /^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/;
- //url地址
- /^[a-zA-z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$/;
- //年/月/日(年-月-日、年.月.日)
- /^(19|20)\d\d[- /.](0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])$/;
- //匹配中文字符
- /[\u4e00-\u9fa5]/;
- //匹配帐号是否合法(字母开头,允许5-10字节,允许字母数字下划线)
- /^[a-zA-Z][a-zA-Z0-9_]{4,9}$/;
- //匹配空白行的正则表达式
- /\n\s*\r/;
- //匹配中国邮政编码
- /[1-9]\d{5}(?!\d)/;
- //匹配身份证
- /\d{15}|\d{18}/;
- //匹配国内电话号码
- /(\d{3}-|\d{4}-)?(\d{8}|\d{7})?/;
- //匹配IP地址
- /((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)/;
- //匹配首尾空白字符的正则表达式
- /^\s*|\s*$/;
- //匹配HTML标记的正则表达式
- < (\S*?)[^>]*>.*?|< .*? />;
63、原生JavaScript实现返回顶部的通用方法
[javascript] view plaincopy
- function backTop(btnId) {
- var btn = document.getElementById(btnId);
- var d = document.documentElement;
- var b = document.body;
- window.onscroll = set;
- btn.style.display = "none";
- btn.onclick = function() {
- btn.style.display = "none";
- window.onscroll = null;
- this.timer = setInterval(function() {
- d.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1);
- b.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1);
- if ((d.scrollTop + b.scrollTop) == 0) clearInterval(btn.timer, window.onscroll = set);
- },
- 10);
- };
- function set() {
- btn.style.display = (d.scrollTop + b.scrollTop > 100) ? ‘block‘: "none"
- }
- };
- backTop(‘goTop‘);
64、原生JavaScript获得URL中GET参数值
[javascript] view plaincopy
- // 用法:如果地址是 test.htm?t1=1&t2=2&t3=3, 那么能取得:GET["t1"], GET["t2"], GET["t3"]
- function get_get(){
- querystr = window.location.href.split("?")
- if(querystr[1]){
- GETs = querystr[1].split("&")
- GET =new Array()
- for(i=0;i<GETs.length;i++){
- tmp_arr = GETs[i].split("=")
- key=tmp_arr[0]
- GET[key] = tmp_arr[1]
- }
- }
- return querystr[1];
- }
65、原生JavaScript实现全选通用方法
[javascript] view plaincopy
- function checkall(form, prefix, checkall) {
- var checkall = checkall ? checkall : ‘chkall‘;
- for(var i = 0; i < form.elements.length; i++) {
- var e = form.elements[i];
- if(e.type=="checkbox"){
- e.checked = form.elements[checkall].checked;
- }
- }
- }
66、原生JavaScript实现全部取消选择通用方法
[javascript] view plaincopy
- function uncheckAll(form) {
- for (var i=0;i<form.elements.length;i++){
- var e = form.elements[i];
- if (e.name != ‘chkall‘)
- e.checked=!e.checked;
- }
- }
67、原生JavaScript实现打开一个窗体通用方法
[javascript] view plaincopy
- function openWindow(url,windowName,width,height){
- var x = parseInt(screen.width / 2.0) - (width / 2.0);
- var y = parseInt(screen.height / 2.0) - (height / 2.0);
- var isMSIE= (navigator.appName == "Microsoft Internet Explorer");
- if (isMSIE) {
- var p = "resizable=1,location=no,scrollbars=no,width=";
- p = p+width;
- p = p+",height=";
- p = p+height;
- p = p+",left=";
- p = p+x;
- p = p+",top=";
- p = p+y;
- retval = window.open(url, windowName, p);
- } else {
- var win = window.open(url, "ZyiisPopup", "top=" + y + ",left=" + x + ",scrollbars=" + scrollbars + ",dialog=yes,modal=yes,width=" + width + ",height=" + height + ",resizable=no" );
- eval("try { win.resizeTo(width, height); } catch(e) { }");
- win.focus();
- }
- }
68、原生JavaScript判断是否为客户端设备
[javascript] view plaincopy
- function client(o){
- var b = navigator.userAgent.toLowerCase();
- var t = false;
- if (o == ‘isOP‘){
- t = b.indexOf(‘opera‘) > -1;
- }
- if (o == ‘isIE‘){
- t = b.indexOf(‘msie‘) > -1;
- }
- if (o == ‘isFF‘){
- t = b.indexOf(‘firefox‘) > -1;
- }
- return t;
- }
69、原生JavaScript获取单选按钮的值
[javascript] view plaincopy
- function get_radio_value(field){
- if(field&&field.length){
- for(var i=0;i<field.length;i++){
- if(field[i].checked){
- return field[i].value;
- }
- }
- }else {
- return ;
- }
- }
70、原生JavaScript获取复选框的值
[javascript] view plaincopy
- function get_checkbox_value(field){
- if(field&&field.length){
- for(var i=0;i<field.length;i++){
- if(field[i].checked && !field[i].disabled){
- return field[i].value;
- }
- }
- }else {
- return;
- }
- }
(71~80)验证篇这一篇文章主要是10个比较常用表单验证功能,包括了邮箱、危险字符、验证长度、验证网址、验证小数、整数、浮点数等常用的验证,有了这些代码片段,平时的表单验证也可以不需要jquery的验证插件了,希望可以帮到大家。。。
71、原生JavaScript判断是否为邮箱
[javascript] view plaincopy
- function isEmail(str){
- var re=/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/;
- if (re.test(str) != true) {
- return false;
- }else{
- return true;
- }
- }
72、原生JavaScript判断是否有列表中的危险字符
[javascript] view plaincopy
- function isValidReg(chars){
- var re=/<|>|\[|\]|\{|\}|『|』|※|○|●|◎|§|△|▲|☆|★|◇|◆|□|▼|㊣|﹋|⊕|⊙|〒|ㄅ|ㄆ|ㄇ|ㄈ|ㄉ|ㄊ|ㄋ|ㄌ|ㄍ|ㄎ|ㄏ|ㄐ|ㄑ|ㄒ|ㄓ|ㄔ|ㄕ|ㄖ|ㄗ|ㄘ|ㄙ|ㄚ|ㄛ|ㄜ|ㄝ|ㄞ|ㄟ|ㄢ|ㄣ|ㄤ|ㄥ|ㄦ|ㄧ|ㄨ|ㄩ|■|▄|▆|\*|@|#|\^|\\/;
- if (re.test( chars) == true) {
- return false;
- }else{
- return true;
- }
- }
73、原生JavaScript判断字符串是否大于规定的长度
[javascript] view plaincopy
- function isValidLength(chars, len) {
- if (chars.length < len) {
- return false;
- }
- return true;
- }
74、原生JavaScript判断字符串是为网址不区分大小写
[javascript] view plaincopy
- function isValidURL( chars ) {
- var re=/^([hH][tT]{2}[pP]:\/\/|[hH][tT]{2}[pP][sS]:\/\/)(\S+\.\S+)$/;
- if (!isNULL(chars)) {
- chars = jsTrim(chars);
- if (chars.match(re) == null)
- return false;
- else
- return true;
- }
- return false;
- }
75、原生JavaScript判断字符串是否为小数
[javascript] view plaincopy
- function isValidDecimal( chars ) {
- var re=/^\d*\.?\d{1,2}$/;
- if (chars.match(re) == null)
- return false;
- else
- return true;
- }
76、原生JavaScript判断字符串是否为整数
[javascript] view plaincopy
- function isNumber( chars ) {
- var re=/^\d*$/;
- if (chars.match(re) == null)
- return false;
- else
- return true;
- }
77、原生JavaScript判断字符串是否为浮点数
[javascript] view plaincopy
- function isFloat( str ) {
- for(i=0;i<str.length;i++) {
- if ((str.charAt(i)<"0" || str.charAt(i)>"9")&& str.charAt(i) != ‘.‘){
- return false;
- }
- }
- return true;
- }
78、原生JavaScript判断字符是否为A-Za-z英文字母
[javascript] view plaincopy
- function isLetters( str ){
- var re=/^[A-Za-z]+$/;
- if (str.match(re) == null)
- return false;
- else
- return true;
- }
79、原生JavaScript判断字符串是否邮政编码
[javascript] view plaincopy
- function isValidPost( chars ) {
- var re=/^\d{6}$/;
- if (chars.match(re) == null)
- return false;
- else
- return true;
- }
80、原生JavaScript判断字符是否空NULL
[javascript] view plaincopy
- function isNULL( chars ) {
- if (chars == null)
- return true;
- if (jsTrim(chars).length==0)
- return true;
- return false;
- }
81、原生JavaScript用正则表达式提取页面代码中所有网址
[javascript] view plaincopy
- var aa = document.documentElement.outerHTML.match(/(url\(|src=|href=)[\"\‘]*([^\"\‘\(\)\<\>\[\] ]+)[\"\‘\)]*|(http:\/\/[\w\-\.]+[^\"\‘\(\)\<\>\[\] ]+)/ig).join("\r\n").replace(/^(src=|href=|url\()[\"\‘]*|[\"\‘\>\) ]*$/igm,"");
- alert(aa)
82、原生JavaScript用正则表达式清除相同的数组(低效率)
[javascript] view plaincopy
- Array.prototype.unique=function(){
- return this.reverse().join(",").match(/([^,]+)(?!.*\1)/ig).reverse();
- }
83、原生JavaScript用正则表达式清除相同的数组(高效率)
[javascript] view plaincopy
- String.prototype.unique=function(){
- var x=this.split(/[\r\n]+/);
- var y=‘‘;
- for(var i=0;i<x.length;i++){
- if(!new RegExp("^"+x[i].replace(/([^\w])/ig,"\\$1")+"$","igm").test(y)){
- y+=x[i]+"\r\n"
- }
- }
- return y
- }
84、原生JavaScript用正则表达式按字母排序,对每行进行数组排序
[javascript] view plaincopy
- function SetSort(){
- var text=K1.value.split(/[\r\n]/).sort().join("\r\n");//顺序
- var test=K1.value.split(/[\r\n]/).sort().reverse().join("\r\n");//反序
- K1.value=K1.value!=text?text:test;
- }
85、原生JavaScript字符串反序
[javascript] view plaincopy
- function IsReverse(text){
- return text.split(‘‘).reverse().join(‘‘);
- }
86、原生JavaScript用正则表达式清除html代码中的脚本
[javascript] view plaincopy
- function clear_script(){
- K1.value=K1.value.replace(/<script.*?>[\s\S]*?<\/script>|\s+on[a-zA-Z]{3,16}\s?=\s?"[\s\S]*?"|\s+on[a-zA-Z]{3,16}\s?=\s?‘[\s\S]*?‘|\s+on[a-zA-Z]{3,16}\s?=[^ >]+/ig,"");
- }
87、原生JavaScript动态执行JavaScript脚本
[javascript] view plaincopy
- function javascript(){
- try{
- eval(K1.value);
- }catch(e){
- alert(e.message);
- }
- }
88、原生JavaScript动态执行VBScript脚本
[javascript] view plaincopy
- function vbscript(){
- try{
- var script=document.getElementById("K1").value;
- if(script.trim()=="")return;
- window.execScript(‘On Error Resume Next \n‘+script+‘\n If Err.Number<>0 Then \n MsgBox "请输入正确的VBScript脚本!",48,"脚本错误!" \n End If‘,"vbscript")
- }catch(e){
- alert(e.message);
- }
- }
89、原生JavaScript实现金额大写转换函数
[javascript] view plaincopy
- function transform(tranvalue) {
- try {
- var i = 1;
- var dw2 = new Array("", "万", "亿"); //大单位
- var dw1 = new Array("拾", "佰", "仟"); //小单位
- var dw = new Array("零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"); //整数部分用
- //以下是小写转换成大写显示在合计大写的文本框中
- //分离整数与小数
- var source = splits(tranvalue);
- var num = source[0];
- var dig = source[1];
- //转换整数部分
- var k1 = 0; //计小单位
- var k2 = 0; //计大单位
- var sum = 0;
- var str = "";
- var len = source[0].length; //整数的长度
- for (i = 1; i <= len; i++) {
- var n = source[0].charAt(len - i); //取得某个位数上的数字
- var bn = 0;
- if (len - i - 1 >= 0) {
- bn = source[0].charAt(len - i - 1); //取得某个位数前一位上的数字
- }
- sum = sum + Number(n);
- if (sum != 0) {
- str = dw[Number(n)].concat(str); //取得该数字对应的大写数字,并插入到str字符串的前面
- if (n == ‘0‘) sum = 0;
- }
- if (len - i - 1 >= 0) { //在数字范围内
- if (k1 != 3) { //加小单位
- if (bn != 0) {
- str = dw1[k1].concat(str);
- }
- k1++;
- } else { //不加小单位,加大单位
- k1 = 0;
- var temp = str.charAt(0);
- if (temp == "万" || temp == "亿") //若大单位前没有数字则舍去大单位
- str = str.substr(1, str.length - 1);
- str = dw2[k2].concat(str);
- sum = 0;
- }
- }
- if (k1 == 3) //小单位到千则大单位进一
- {
- k2++;
- }
- }
- //转换小数部分
- var strdig = "";
- if (dig != "") {
- var n = dig.charAt(0);
- if (n != 0) {
- strdig += dw[Number(n)] + "角"; //加数字
- }
- var n = dig.charAt(1);
- if (n != 0) {
- strdig += dw[Number(n)] + "分"; //加数字
- }
- }
- str += "元" + strdig;
- } catch(e) {
- return "0元";
- }
- return str;
- }
- //拆分整数与小数
- function splits(tranvalue) {
- var value = new Array(‘‘, ‘‘);
- temp = tranvalue.split(".");
- for (var i = 0; i < temp.length; i++) {
- value[i] = temp[i];
- }
- return value;
- }
90、原生JavaScript常用的正则表达式大收集
[plain] view plaincopy
- 匹配中文字符的正则表达式: [\u4e00-\u9fa5]
- 匹配双字节字符(包括汉字在内):[^\x00-\xff]
- 匹配空行的正则表达式:\n[\s| ]*\r
- 匹配 HTML 标记的正则表达式:<(.*)>.*<\/\1>|<(.*) \/>
- 匹配首尾空格的正则表达式:(^\s*)|(\s*$)
- 匹配 IP 地址的正则表达式:/(\d+)\.(\d+)\.(\d+)\.(\d+)/g
- 匹配 Email 地址的正则表达式:\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
- 匹配网址 URL 的正则表达式:http://(/[\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?
- sql 语句:^(select|drop|delete|create|update|insert).*$
- 非负整数:^\d+$
- 正整数:^[0-9]*[1-9][0-9]*$
- 非正整数:^((-\d+)|(0+))$
- 负整数:^-[0-9]*[1-9][0-9]*$
- 整数:^-?\d+$
- 非负浮点数:^\d+(\.\d+)?$
- 正浮点数:^((0-9)+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$
- 非正浮点数:^((-\d+\.\d+)?)|(0+(\.0+)?))$
- 英文字符串:^[A-Za-z]+$
- 英文大写串:^[A-Z]+$
- 英文小写串:^[a-z]+$
- 英文字符数字串:^[A-Za-z0-9]+$
- 英数字加下划线串:^\w+$
- E-mail地址:^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$
- URL:^[a-zA-Z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\s*)?$ 或:^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\‘:+!]*([^<>\"\"])*$
- 邮政编码:^[1-9]\d{5}$
- 电话号码:^((\(\d{2,3}\))|(\d{3}\-))?(\(0\d{2,3}\)|0\d{2,3}-)?[1-9]\d{6,7}(\-\d{1,4})?$
- 手机号码:^((\(\d{2,3}\))|(\d{3}\-))?13\d{9}$
- 双字节字符(包括汉字在内):^\x00-\xff
- 匹配首尾空格:(^\s*)|(\s*$)
- 匹配 HTML 标记:<(.*)>.*<\/\1>|<(.*) \/>
- 匹配空行:\n[\s| ]*\r
- 提取信息中的网络链接:(h|H)(r|R)(e|E)(f|F) *= *(‘|")?(\w|\\|\/|\.)+(‘|"| *|>)?
- 提取信息中的邮件地址:\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
- 提取信息中的图片链接:(s|S)(r|R)(c|C) *= *(‘|")?(\w|\\|\/|\.)+(‘|"| *|>)?
- 提取信息中的 IP 地址:(\d+)\.(\d+)\.(\d+)\.(\d+)
- 提取信息中的中国手机号码:(86)*0*13\d{9}
- 提取信息中的中国固定电话号码:(\(\d{3,4}\)|\d{3,4}-|\s)?\d{8}
- 提取信息中的中国电话号码(包括移动和固定电话):(\(\d{3,4}\)|\d{3,4}-|\s)?\d{7,14}
- 提取信息中的中国邮政编码:[1-9]{1}(\d+){5}
- 提取信息中的浮点数(即小数):(-?\d*)\.?\d+
- 提取信息中的任何数字 :(-?\d*)(\.\d+)?
- IP:(\d+)\.(\d+)\.(\d+)\.(\d+)
- 电话区号:^0\d{2,3}$
- 腾讯 QQ 号:^[1-9]*[1-9][0-9]*$
- 帐号(字母开头,允许 5-16 字节,允许字母数字下划线):^[a-zA-Z][a-zA-Z0-9_]{4,15}$
- 中文、英文、数字及下划线:^[\u4e00-\u9fa5_a-zA-Z0-9]+$
91、原生JavaScript实现窗体改变事件resize的操作(兼容所以的浏览器)
[javascript] view plaincopy
- (function(){
- var fn = function(){
- var w = document.documentElement ? document.documentElement.clientWidth : document.body.clientWidth
- ,r = 1255
- ,b = Element.extend(document.body)
- ,classname = b.className;
- if(w < r){
- //当窗体的宽度小于1255的时候执行相应的操作
- }else{
- //当窗体的宽度大于1255的时候执行相应的操作
- }
- }
- if(window.addEventListener){
- window.addEventListener(‘resize‘, function(){ fn(); });
- }else if(window.attachEvent){
- window.attachEvent(‘onresize‘, function(){ fn(); });
- }
- fn();
- })();
92、原生JavaScript用正则清除空格分左右
[javascript] view plaincopy
- function ltrim(s){ return s.replace( /^(\s*| *)/, ""); }
- function rtrim(s){ return s.replace( /(\s*| *)$/, ""); }
- function trim(s){ return ltrim(rtrim(s));}
93、原生JavaScript判断变量是否空值
[javascript] view plaincopy
- /**
- * 判断变量是否空值
- * undefined, null, ‘‘, false, 0, [], {} 均返回true,否则返回false
- */
- function empty(v){
- switch (typeof v){
- case ‘undefined‘ : return true;
- case ‘string‘ : if(trim(v).length == 0) return true; break;
- case ‘boolean‘ : if(!v) return true; break;
- case ‘number‘ : if(0 === v) return true; break;
- case ‘object‘ :
- if(null === v) return true;
- if(undefined !== v.length && v.length==0) return true;
- for(var k in v){return false;} return true;
- break;
- }
- return false;
- }
94、原生JavaScript实现base64解码
[javascript] view plaincopy
- function base64_decode(data){
- var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
- var o1, o2, o3, h1, h2, h3, h4, bits, i = 0,ac = 0,dec = "",tmp_arr = [];
- if (!data) { return data; }
- data += ‘‘;
- do {
- h1 = b64.indexOf(data.charAt(i++));
- h2 = b64.indexOf(data.charAt(i++));
- h3 = b64.indexOf(data.charAt(i++));
- h4 = b64.indexOf(data.charAt(i++));
- bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;
- o1 = bits >> 16 & 0xff;
- o2 = bits >> 8 & 0xff;
- o3 = bits & 0xff;
- if (h3 == 64) {
- tmp_arr[ac++] = String.fromCharCode(o1);
- } else if (h4 == 64) {
- tmp_arr[ac++] = String.fromCharCode(o1, o2);
- } else {
- tmp_arr[ac++] = String.fromCharCode(o1, o2, o3);
- }
- } while (i < data.length);
- dec = tmp_arr.join(‘‘);
- dec = utf8_decode(dec);
- return dec;
- }
95、原生JavaScript实现utf8解码
[javascript] view plaincopy
- function utf8_decode(str_data){
- var tmp_arr = [],i = 0,ac = 0,c1 = 0,c2 = 0,c3 = 0;str_data += ‘‘;
- while (i < str_data.length) {
- c1 = str_data.charCodeAt(i);
- if (c1 < 128) {
- tmp_arr[ac++] = String.fromCharCode(c1);
- i++;
- } else if (c1 > 191 && c1 < 224) {
- c2 = str_data.charCodeAt(i + 1);
- tmp_arr[ac++] = String.fromCharCode(((c1 & 31) << 6) | (c2 & 63));
- i += 2;
- } else {
- c2 = str_data.charCodeAt(i + 1);
- c3 = str_data.charCodeAt(i + 2);
- tmp_arr[ac++] = String.fromCharCode(((c1 & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
- i += 3;
- }
- }
- return tmp_arr.join(‘‘);
- }
96、原生JavaScript获取窗体可见范围的宽与高
[javascript] view plaincopy
- function getViewSize(){
- var de=document.documentElement;
- var db=document.body;
- var viewW=de.clientWidth==0 ? db.clientWidth : de.clientWidth;
- var viewH=de.clientHeight==0 ? db.clientHeight : de.clientHeight;
- return Array(viewW ,viewH);
- }
97、原生JavaScript判断IE版本号(既简洁、又向后兼容!)
[javascript] view plaincopy
- var _IE = (function(){
- var v = 3, div = document.createElement(‘div‘), all = div.getElementsByTagName(‘i‘);
- while (
- div.innerHTML = ‘<!--[if gt IE ‘ + (++v) + ‘]><i></i><![endif]-->‘,
- all[0]
- );
- return v > 4 ? v : false ;
- }());
98、原生JavaScript获取浏览器版本号
[javascript] view plaincopy
- function browserVersion(types) {
- var other = 1;
- for (i in types) {
- var v = types[i] ? types[i] : i;
- if (USERAGENT.indexOf(v) != -1) {
- var re = new RegExp(v + ‘(\\/|\\s|:)([\\d\\.]+)‘, ‘ig‘);
- var matches = re.exec(USERAGENT);
- var ver = matches != null ? matches[2] : 0;
- other = ver !== 0 && v != ‘mozilla‘ ? 0 : other;
- } else {
- var ver = 0;
- }
- eval(‘BROWSER.‘ + i + ‘= ver‘);
- }
- BROWSER.other = other;
- }
99、原生JavaScript半角转换为全角函数
[javascript] view plaincopy
- function ToDBC(str){
- var result = ‘‘;
- for(var i=0; i < str.length; i++){
- code = str.charCodeAt(i);
- if(code >= 33 && code <= 126){
- result += String.fromCharCode(str.charCodeAt(i) + 65248);
- }else if (code == 32){
- result += String.fromCharCode(str.charCodeAt(i) + 12288 - 32);
- }else{
- result += str.charAt(i);
- }
- }
- return result;
- }
100.原生JavaScript全角转换为半角函数
- function ToCDB(str){
- var result = ‘‘;
- for(var i=0; i < str.length; i++){
- code = str.charCodeAt(i);
- if(code >= 65281 && code <= 65374){
- result += String.fromCharCode(str.charCodeAt(i) - 65248);
- }else if (code == 12288){
- result += String.fromCharCode(str.charCodeAt(i) - 12288 + 32);
- }else{
- result += str.charAt(i);
- }
- }
- return result;
- }