javascript 类似随机抽奖

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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").value = alldataarr[GetRnd(0,num)]; } function start(){ clearInterval(timer); timer = setInterval("change()",46); //随机数据变换速度，越小变换的越快 } function ok(){ clearInterval(timer); } function GetRnd(min,max){ return parseInt(Math.random()*(max-min+1)); }

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