做了随机抽奖的

var alldata = "a,b,c,d,e,f,g,h,j,k"; 
 var timer;
  var data = alldata.split(',');
  var dataLen = alldata.split(',').length-1; 
 
 function chageValue(){ 
     $('#oknum').val( data[getName(0,dataLen)] ) 
 }; 
 
 function start(){ 
     clearInterval(timer) ;
     timer = setInterval('chageValue()',60)
  }; 
 
 function stop(){ clearInterval(timer); };
  
 function getName(min,max){
      return parseInt(Math.random()*max-min+1);
 }

转载于:https://www.cnblogs.com/taoze/archive/2012/09/19/2694136.html