JavaScript生成指定范围随机数并动态显示的实现方法

<!doctype html> 
<html> 
<head> 
<meta charset="utf-8"> 
<title>Document</title> 
<style> 
  #count{ 
    font-size: 20px; 
    color: green; 
    width: 400px; 
    height: 30px; 
    border: 1px solid black; 
    margin: auto; 
    line-height: 30px; 
    text-align: center; 
  } 
  </style> 
</head> 
<body> 
  <div id="count"></div> 
  <script> 
  //产生随机数 
function count (){ 
  var i=Math.random()*(999999-100000)+100000; 
  var j=parseInt(i,10); 
  j="100000-999999随机产生："+j; 
  document.getElementById("count").innerHTML= j; 
} 
setInterval("count()",100); 
  </script> 
</body> 
</html>