JS生成随机数

<script>   
  
var i=1; //counter  
  
function randValue(maxVal,no_of_time)  
  
{   
  
  i++; //counter increment   
  
  document.getElementById('random').innerHTML=''; //element made blank  
  
  //get a random no upto maxVal and round it to two decimal place  
  
  var theNumber = (Math.random()*parseInt(maxVal)).toFixed(2);   
  
  //put the number to that   
  
  document.getElementById('random').innerHTML=theNumber; //gett   
  
  if(i<=no_of_time)   
  
    setTimeout("randvalue("+maxVal+","+no_of_time+")",300);   
  
  else   
  
    i=1;  
  
}  
  
</script>