javascript 随机抽奖程序代码

<html> <title>随机抽奖程序</title> <head><meta http-equiv=Content-Type content="text/html; charset=gb2312"> </head> <body> <script type="text/javascript"><!-- var alldata = "ASP,PHP,AJAX,ASP.NET,CSHARP,VB.NET,DELPHI,VB,VC,JS" //抽奖数据，以逗号分隔 var alldataarr = alldata.split(",") var num = alldataarr.length-1 var timer function change(){ document.getElementById("oknum").innerHTML = alldataarr[GetRnd(0,num)]; } function start(){ clearInterval(timer); timer = setInterval('change()',10); //随机数据变换速度，越小变换的越快 } function ok(){ clearInterval(timer); document.getElementById("showresult").value=document.getElementById("oknum").innerText; } function GetRnd(min,max){ return parseInt(Math.random()*(max-min+1)); } // --></script> 请单击开始抽奖 <button onclick="start()" accesskey="s">开始抽奖(<U>S</U>)</button> <button onclick="ok()" accesskey="o">停止(<U>O</U>)</button> <input type="text" id="showresult" value=""> </body> </html>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]