javascript 类似随机抽奖

javascript 类似随机抽奖360
 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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