数组遍历（2） for in

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>

<title>数组遍历</title>
<style type="text/css">
#show{
   font: 16px;
   background:red;
   width:200px;
}
</style>
    <script type="text/javascript" >
        var a = [3,5,6,2,1,4];
  var str="";
  document.write("<div id='show'>");
  
  for(var index in a)
  {
    str+="数组的第"+(parseInt(index)+1)+"个元素:"+a[index]+"<br/>";
  }
  document.write(str+"</div>");

  
 </script>
</head>
<body>
 

</body>
</html>

posted @ 2014-02-17 17:30  birdlow  阅读(159)  评论(0)    收藏  举报