JavaScript简单抽奖程序的实现及代码
1.需求说明
某公司年终抽奖,需要有如下功能
1)可以根据实际情况设置到场人数的最大值
2) 点击“开始”,大屏幕滚动,点击“停止”,获奖者的编号出现在大屏幕上
3)在界面里显示全部奖项获奖人编号
4)不重复获奖
5)不会因为输入错误而导致抽奖结果异常。
2.代码呈上
- <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 TRANSITIONAL//EN">
- <html>
- <head>
- <title>某公司周年庆抽奖</title>
- <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
- <script language="javascript">
- var timer;
- var flag = new Array(100);
- var existingnum = new Array(100);
- var clickTimes = 0;
- var randnum;
- var cellnum =1;
- var mobile;
- var num ;
- function check_input(){
- var input = document.getElementById("real_num").value;
- var re = /^[1-9]+[0-9]*]*$/;
- if (!re.test(input)){
- alert("请输入正整数");
- window.location.href=window.location.href;
- return false;
- }
- }
- //get the random numbers from the mobile array every 0.05s
- function setTimer(){
- timer = setInterval("getRandNum();",50);
- document.getElementById("start").disabled = true;
- document.getElementById("end").disabled = false;
- }
- function getRandNum(){
- document.getElementById("result").value = mobile[GetRnd(0,num)];
- }
- function GetRnd(min,max){
- randnum = parseInt(Math.random()*(max-min+1));
- return randnum;
- }
- //------------------------------------------------
- //turn the input‘s running down
- function clearTimer(){
- noDupNum();
- clearInterval(timer);
- document.getElementById("start").disabled = false;
- document.getElementById("end").disabled = true;
- }
- // Re defined array:change the length of the array and delete the checked one
- function noDupNum(){
- mobile.removeEleAt(randnum);
- var o = 0;
- for(p=0; p<mobile.length;p++){
- if(typeof mobile[p]!="undefined"){
- mobile[o] = mobile[p];
- o++;
- }
- }
- num = mobile.length-1;
- }
- function setValues(){
- document.getElementById(cellnum).value = document.getElementById("result").value ;
- cellnum++;
- }
- function set_array(){
- var real_num = document.getElementById("real_num").value ;
- mobile= new Array(real_num);
- var o = 0;
- for(i=1; i<=real_num;i++){
- mobile[o] = i;
- o++;
- }
- num = mobile.length-1;
- document.getElementById("set_number").disabled = true;
- }
- Array.prototype.removeEleAt = function(dx){
- if(isNaN(dx)||dx>this.length){return false;}
- this.splice(dx,1);
- }
- </script>
- </head>
- <body>
- <center>
- <div id="main">
- <div>
- <h1>获奖小伙伴</h1>
- <p>
- <input id="result" type="text" size="30" style="height:130px;width:800px;border:2px solid red;font-size:120;" readonly/>
- </p>
- <p>
- <input id="start" type="button" value="开始" style="border: 1px solid; border-color: #aaa 000 #000 #aaa;width:4em; background: #fc0;" />
- <input id="end" type="button" value="停" style="border: 1px solid; border-color: #aaa 000 #000 #aaa;width:4em; background: #fc0;" disabled/>
- </p>
- <p><strong>一等奖(1名)</strong></p>
- <table width="190" height="30" border="1">
- <tr>
- <td><input name="text1" type="text" id="3" style="height:30px;width:190px;border:1px solid red;font-size:25;" size="28" readonly/></td>
- </tr>
- </table>
- <p>二等奖(2名)</p>
- <table width="380" height="30" border="1">
- <tr>
- <td><input name="text2" type="text" id="2" style="height:30px;width:190px;border:1px solid red;font-size:25;" size="28" readonly/></td>
- <td><input name="text3" type="text" id="1" style="height:30px;width:190px;border:1px solid red;font-size:25;" size="20" readonly/></td>
- </tr>
- </table>
- </div>
- </div>
- <p></p>
- <p></p>
- <div id="setter" style="border:1px solid;width:45em">
- <h3>系统设置</h3>
- <table width="300" height="30" border="1">
- <tr>
- <td>活动人数</td>
- <td><input type="text" id="real_num" style="width:11em"></td>
- <td><input id="set_number" type="button" value="设置" style="border: 1px solid; border-color: #aaa 000 #000 #aaa;width:4em; background: #fc0;"
- </tr>
- <tr>
- </tr>
- </table>
- <br/>
- <input id="set_number" type="button" value="重新开始抽奖" style="border: 1px solid; border-color: #aaa 000 #000 #aaa;width:45em;height: 3em;background: #fc0;" onclick="window.location.href=window.location.href;"/>
- <p></p>
- </div>
- <center>
- </body>
- </html>
复制代码
3.丑陋截图
我很丑,但是我很温柔~
时间: 2024-10-11 04:43:37