收集了一些比较常用的javascript函数。
1、字符串长度截取
function cutstr(str, len) { var temp, icount = 0, patrn = /[^\x00-\xff]/, 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、替换全部
String.prototype.replaceAll = function(s1, s2) { return this.replace(new RegExp(s1, "gm"), s2) }
3、清除空格
String.prototype.trim = function() { var reExtraSpace = /^\s*(.*?)\s+$/; return this.replace(reExtraSpace, "$1") }
4、清除左空格/右空格
function ltrim(s){ return s.replace( /^(\s*| *)/, ""); } function rtrim(s){ return s.replace( /(\s*| *)$/, ""); }
5、判断是否以某个字符串开头
String.prototype.startWith = function (s) { return this.indexOf(s) == 0 }
6、判断是否以某个字符串结束
String.prototype.endWith = function (s) { var d = this.length - s.length; return (d >= 0 && this.lastIndexOf(s) == d) }
7、转义html标签
function HtmlEncode(text) { return text.replace(/&/g, ‘&‘).replace(/\"/g, ‘"‘).replace(/</g, ‘<‘).replace(/>/g, ‘>‘) }
8、时间日期格式转换
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 }
9、判断是否为数字类型
function isDigit(value) { var patrn = /^[0-9]*$/; if (patrn.exec(value) == null || value == "") { return false } else { return true } }
10、设置cookie值
function setCookie(name, value, Hours) { var d = new Date(); var offset = 8; var utc = d.getTime() + (d.getTimezoneOffset() * 60000); var nd = utc + (3600000 * offset); var exp = new Date(nd); exp.setTime(exp.getTime() + Hours * 60 * 60 * 1000); document.cookie = name + "=" + escape(value) + ";path=/;expires=" + exp.toGMTString() + ";domain=360doc.com;" }
11、获取cookie值
function getCookie(name) { var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)")); if (arr != null) return unescape(arr[2]); return null }
12、加入收藏夹
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") } } }
13、设为首页
function setHomepage() { if (document.all) { document.body.style.behavior = ‘url(#default#homepage)‘; document.body.setHomePage(‘http://w3cboy.com‘) } 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://w3cboy.com‘) } }
14、加载样式文件
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、返回脚本内容
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、清除脚本内容
function stripscript(s) { return s.replace(/<script.*?>.*?<\/script>/ig, ‘‘); }
17、动态加载脚本文件
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、返回按ID检索的元素对象
function $(id) { return !id ? null : document.getElementById(id); }
19、跨浏览器绑定事件
function addEventSamp(obj,evt,fn){ if(!oTarget){return;} if (obj.addEventListener) { obj.addEventListener(evt, fn, false); }else if(obj.attachEvent){ obj.attachEvent(‘on‘+evt,fn); }else{ oTarget["on" + sEvtType] = fn; } }
20、跨浏览器删除事件
function delEvt(obj,evt,fn){ if(!obj){return;} if(obj.addEventListener){ obj.addEventListener(evt,fn,false); }else if(oTarget.attachEvent){ obj.attachEvent("on" + evt,fn); }else{ obj["on" + evt] = fn; } }
21、为元素添加on方法
Element.prototype.on = Element.prototype.addEventListener; NodeList.prototype.on = function (event, fn) {、 [][‘forEach‘].call(this, function (el) { el.on(event, fn); }); return this; };
22、为元素添加trigger方法
Element.prototype.trigger = function (type, data) { var event = document.createEvent(‘HTMLEvents‘); event.initEvent(type, true, true); event.data = data || {}; event.eventName = type; event.target = this; this.dispatchEvent(event); return this; }; NodeList.prototype.trigger = function (event) { [][‘forEach‘].call(this, function (el) { el[‘trigger‘](event); }); return this; };
23、检验URL链接是否有效
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); } } }
24、格式化CSS样式代码
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; }
25、压缩CSS样式代码
function compressCss (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]; }
26、获取当前路径
var currentPageUrl = ""; if (typeof this.href === "undefined") { currentPageUrl = document.location.toString().toLowerCase(); }else { currentPageUrl = this.href.toString().toLowerCase(); }
27、判断是否移动设备
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; }
28、判断是否移动设备访问
function isMobileUserAgent(){ return (/iphone|ipod|android.*mobile|windows.*phone|blackberry.*mobile/i.test(window.navigator.userAgent.toLowerCase())); }
29、判断是否苹果移动设备访问
function isAppleMobileDevice(){ return (/iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase())); }
30、判断是否安卓移动设备访问
function isAndroidMobileDevice(){ return (/android/i.test(navigator.userAgent.toLowerCase())); }
31、判断是否Touch屏幕
function isTouchScreen(){ return ((‘ontouchstart‘ in window) || window.DocumentTouch && document instanceof DocumentTouch); }
32、判断是否打开视窗
function isViewportOpen() { return !!document.getElementById(‘wixMobileViewport‘); }
33、获取移动设备初始化大小
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; }
34、获取移动设备最大化大小
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; } }
35、获取移动设备屏幕宽度
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; }
36、完美判断是否为网址
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_:\@&?=+,.!\/~%\$]*)?)$/i if (regular.test(strUrl)) { return true; }else { return false; } }
37、去掉url前缀
function removeUrlPrefix(a){ a=a.replace(/:/g,":").replace(/./g,".").replace(///g,"/"); while(trim(a).toLowerCase().indexOf("http://")==0){ a=trim(a.replace(/http:\/\//i,"")); } return a; }
38、随机数时间戳
function uniqueId(){ var a=Math.random,b=parseInt; return Number(new Date()).toString()+b(10*a())+b(10*a())+b(10*a()); }
39、时间个性化输出功能
1 /* 2 1、< 60s, 显示为“刚刚” 3 2、>= 1min && < 60 min, 显示与当前时间差“XX分钟前” 4 3、>= 60min && < 1day, 显示与当前时间差“今天 XX:XX” 5 4、>= 1day && < 1year, 显示日期“XX月XX日 XX:XX” 6 5、>= 1year, 显示具体日期“XXXX年XX月XX日 XX:XX” 7 */ 8 function timeFormat(time){ 9 var date = new Date(time), 10 curDate = new Date(), 11 year = date.getFullYear(), 12 month = date.getMonth() + 10, 13 day = date.getDate(), 14 hour = date.getHours(), 15 minute = date.getMinutes(), 16 curYear = curDate.getFullYear(), 17 curHour = curDate.getHours(), 18 timeStr; 19 20 if(year < curYear){ 21 timeStr = year +‘年‘+ month +‘月‘+ day +‘日 ‘+ hour +‘:‘+ minute; 22 }else{ 23 var pastTime = curDate - date, 24 pastH = pastTime/3600000; 25 26 if(pastH > curHour){ 27 timeStr = month +‘月‘+ day +‘日 ‘+ hour +‘:‘+ minute; 28 }else if(pastH >= 1){ 29 timeStr = ‘今天 ‘ + hour +‘:‘+ minute +‘分‘; 30 }else{ 31 var pastM = curDate.getMinutes() - minute; 32 if(pastM > 1){ 33 timeStr = pastM +‘分钟前‘; 34 }else{ 35 timeStr = ‘刚刚‘; 36 } 37 } 38 } 39 return timeStr; 40 }
40、常用的正则表达式
1 //正整数 2 /^[0-9]*[1-9][0-9]*$/; 3 //负整数 4 /^-[0-9]*[1-9][0-9]*$/; 5 //正浮点数 6 /^(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$/; 7 //负浮点数 8 /^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$/; 9 //浮点数 10 /^(-?\d+)(\.\d+)?$/; 11 //email地址 12 /^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/; 13 //url地址 14 /^[a-zA-z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$/; 15 或:^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\‘:+!]*([^<>\"\"])*$ 16 //年/月/日(年-月-日、年.月.日) 17 /^(19|20)\d\d[- /.](0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])$/; 18 //匹配中文字符 19 /[\u4e00-\u9fa5]/; 20 //匹配帐号是否合法(字母开头,允许5-10字节,允许字母数字下划线) 21 /^[a-zA-Z][a-zA-Z0-9_]{4,9}$/; 22 //匹配空白行的正则表达式 23 /\n\s*\r/; 24 //匹配中国邮政编码 25 /[1-9]\d{5}(?!\d)/; 26 //匹配身份证 27 /\d{15}|\d{18}/; 28 //匹配国内电话号码 29 /(\d{3}-|\d{4}-)?(\d{8}|\d{7})?/; 30 //匹配IP地址 31 /((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)/; 32 //匹配首尾空白字符的正则表达式 33 /^\s*|\s*$/; 34 //匹配HTML标记的正则表达式 35 < (\S*?)[^>]*>.*?|< .*? />; 36 //sql 语句 37 ^(select|drop|delete|create|update|insert).*$ 38 //提取信息中的网络链接 39 (h|H)(r|R)(e|E)(f|F) *= *(‘|")?(\w|\\|\/|\.)+(‘|"| *|>)? 40 //提取信息中的邮件地址 41 \w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)* 42 //提取信息中的图片链接 43 (s|S)(r|R)(c|C) *= *(‘|")?(\w|\\|\/|\.)+(‘|"| *|>)? 44 //提取信息中的 IP 地址 45 (\d+)\.(\d+)\.(\d+)\.(\d+) 46 //取信息中的中国手机号码 47 (86)*0*13\d{9} 48 //提取信息中的中国邮政编码 49 [1-9]{1}(\d+){5} 50 //提取信息中的浮点数(即小数) 51 (-?\d*)\.?\d+ 52 //提取信息中的任何数字 53 (-?\d*)(\.\d+)? 54 //电话区号 55 ^0\d{2,3}$ 56 //腾讯 QQ 号 57 ^[1-9]*[1-9][0-9]*$ 58 //帐号(字母开头,允许 5-16 字节,允许字母数字下划线) 59 ^[a-zA-Z][a-zA-Z0-9_]{4,15}$ 60 //中文、英文、数字及下划线 61 ^[\u4e00-\u9fa5_a-zA-Z0-9]+$
41、返回顶部的通用方法
1 function backTop(btnId) { 2 var btn = document.getElementById(btnId); 3 var d = document.documentElement; 4 var b = document.body; 5 window.onscroll = set; 6 btn.style.display = "none"; 7 btn.onclick = function() { 8 btn.style.display = "none"; 9 window.onscroll = null; 10 this.timer = setInterval(function() { 11 d.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1); 12 b.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1); 13 if ((d.scrollTop + b.scrollTop) == 0) clearInterval(btn.timer, window.onscroll = set); 14 }, 10); 15 }; 16 function set() { 17 btn.style.display = (d.scrollTop + b.scrollTop > 100) ? ‘block‘: "none" 18 } 19 }; 20 backTop(‘goTop‘);
42、获得URL中GET参数值
1 // 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"] 2 function get_get(){ 3 querystr = window.location.href.split("?") 4 if(querystr[1]){ 5 GETs = querystr[1].split("&"); 6 GET = []; 7 for(i=0;i<GETs.length;i++){ 8 tmp_arr = GETs.split("=") 9 key=tmp_arr[0] 10 GET[key] = tmp_arr[1] 11 } 12 } 13 return querystr[1]; 14 }
43、清除相同的数组
1 String.prototype.unique=function(){ 2 var x=this.split(/[\r\n]+/); 3 var y=‘‘; 4 for(var i=0;i<x.length;i++){ 5 if(!new RegExp("^"+x.replace(/([^\w])/ig,"\\$1")+"$","igm").test(y)){ 6 y+=x+"\r\n" 7 } 8 } 9 return y 10 };
44、按字母排序,对每行进行数组排序
1 function SetSort(){ 2 var text=K1.value.split(/[\r\n]/).sort().join("\r\n");//顺序 3 var test=K1.value.split(/[\r\n]/).sort().reverse().join("\r\n");//反序 4 K1.value=K1.value!=text?text:test; 5 }
45、字符串反序
function IsReverse(text){ return text.split(‘‘).reverse().join(‘‘); }
46、清除html代码中的脚本
1 function clear_script(){ 2 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,""); 3 } 4 动态执行JavaScript脚本 5 6 function javascript(){ 7 try{ 8 eval(K1.value); 9 }catch(e){ 10 alert(e.message); 11 } 12 }
47、金额大写转换函数
1 function transform(tranvalue) { 2 try { 3 var i = 1; 4 var dw2 = new Array("", "万", "亿"); //大单位 5 var dw1 = new Array("拾", "佰", "仟"); //小单位 6 var dw = new Array("零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"); //整数部分用 7 //以下是小写转换成大写显示在合计大写的文本框中 8 //分离整数与小数 9 var source = splits(tranvalue); 10 var num = source[0]; 11 var dig = source[1]; 12 //转换整数部分 13 var k1 = 0; //计小单位 14 var k2 = 0; //计大单位 15 var sum = 0; 16 var str = ""; 17 var len = source[0].length; //整数的长度 18 for (i = 1; i <= len; i++) { 19 var n = source[0].charAt(len - i); //取得某个位数上的数字 20 var bn = 0; 21 if (len - i - 1 >= 0) { 22 bn = source[0].charAt(len - i - 1); //取得某个位数前一位上的数字 23 } 24 sum = sum + Number(n); 25 if (sum != 0) { 26 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 27 if (n == ‘0‘) sum = 0; 28 } 29 if (len - i - 1 >= 0) { //在数字范围内 30 if (k1 != 3) { //加小单位 31 if (bn != 0) { 32 str = dw1[k1].concat(str); 33 } 34 k1++; 35 } else { //不加小单位,加大单位 36 k1 = 0; 37 var temp = str.charAt(0); 38 if (temp == "万" || temp == "亿") //若大单位前没有数字则舍去大单位 39 str = str.substr(1, str.length - 1); 40 str = dw2[k2].concat(str); 41 sum = 0; 42 } 43 } 44 if (k1 == 3){ //小单位到千则大单位进一 45 k2++; 46 } 47 } 48 //转换小数部分 49 var strdig = ""; 50 if (dig != "") { 51 var n = dig.charAt(0); 52 if (n != 0) { 53 strdig += dw[Number(n)] + "角"; //加数字 54 } 55 var n = dig.charAt(1); 56 if (n != 0) { 57 strdig += dw[Number(n)] + "分"; //加数字 58 } 59 } 60 str += "元" + strdig; 61 } catch(e) { 62 return "0元"; 63 } 64 return str; 65 } 66 //拆分整数与小数 67 function splits(tranvalue) { 68 var value = new Array(‘‘, ‘‘); 69 temp = tranvalue.split("."); 70 for (var i = 0; i < temp.length; i++) { 71 value = temp; 72 } 73 return value; 74 }
48、实现base64解码
1 function base64_decode(data){ 2 var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="; 3 var o1, o2, o3, h1, h2, h3, h4, bits, i = 0,ac = 0,dec = "",tmp_arr = []; 4 if (!data) { return data; } 5 data += ‘‘; 6 do { 7 h1 = b64.indexOf(data.charAt(i++)); 8 h2 = b64.indexOf(data.charAt(i++)); 9 h3 = b64.indexOf(data.charAt(i++)); 10 h4 = b64.indexOf(data.charAt(i++)); 11 bits = h1 << 18 | h2 << 12 | h3 << 6 | h4; 12 o1 = bits >> 16 & 0xff; 13 o2 = bits >> 8 & 0xff; 14 o3 = bits & 0xff; 15 if (h3 == 64) { 16 tmp_arr[ac++] = String.fromCharCode(o1); 17 } else if (h4 == 64) { 18 tmp_arr[ac++] = String.fromCharCode(o1, o2); 19 } else { 20 tmp_arr[ac++] = String.fromCharCode(o1, o2, o3); 21 } 22 } while (i < data.length); 23 dec = tmp_arr.join(‘‘); 24 dec = utf8_decode(dec); 25 return dec; 26 }
49、实现utf8解码
1 function utf8_decode(str_data){ 2 var tmp_arr = [],i = 0,ac = 0,c1 = 0,c2 = 0,c3 = 0;str_data += ‘‘; 3 while (i < str_data.length) { 4 c1 = str_data.charCodeAt(i); 5 if (c1 < 128) { 6 tmp_arr[ac++] = String.fromCharCode(c1); 7 i++; 8 } else if (c1 > 191 && c1 < 224) { 9 c2 = str_data.charCodeAt(i + 1); 10 tmp_arr[ac++] = String.fromCharCode(((c1 & 31) << 6) | (c2 & 63)); 11 i += 2; 12 } else { 13 c2 = str_data.charCodeAt(i + 1); 14 c3 = str_data.charCodeAt(i + 2); 15 tmp_arr[ac++] = String.fromCharCode(((c1 & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63)); 16 i += 3; 17 } 18 } 19 return tmp_arr.join(‘‘); 20 }
50、获取窗体可见范围的宽与高
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); }
51、判断鼠标是否移出事件
function isMouseOut(e, handler) { if (e.type !== ‘mouseout‘) { return false; } var reltg = e.relatedTarget ? e.relatedTarget : e.type === ‘mouseout‘ ? e.toElement : e.fromElement; while (reltg && reltg !== handler) { reltg = reltg.parentNode; } return (reltg !== handler); }
52、半角转换为全角函数
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; }
53、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; }
时间: 2024-10-11 17:23:40