Ferris教程学习笔记:js示例2.3 用循环将三个DIV变成红色 

<!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"><head>
<meta http-equiv="Content-Type" content="text/html; charset=gbk">
<title>用循环将三个DIV变成红色</title>
<style type="text/css">
#outer{width:330px;height:100px;margin:10px auto;}
#outer div{float:left;width:100px;height:100px;margin:0 5px;background:black;}
</style>
</head>
<body>
 <center>
  <button>点击将div变成红色</button>
 </center>
 <div id="outer">
  <div></div>
  <div></div>
  <div></div>
  </div>
<script type="text/javascript">
 window.onload = function(){
   var button = document.getElementsByTagName("button")[0];
   var divs = document.getElementsByTagName("div");
   var size = divs.length;
   
   button.onclick = function(){
   for(var i=1;i<size;i++){
     divs[i].style.backgroundColor = "red";
   }
   };
   
   
   
 }
</script>  
</body>
</html>

 

posted @ 2013-12-11 16:16  kaka100  阅读(205)  评论(0)  编辑  收藏  举报