document事件实例

 1 <html xmlns="http://www.w3.org/1999/xhtml">
 2 <head>
 3 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 4 <title>无标题文档</title>
 5 <style type="text/css">
 6 .item{width:200px;height:200px;background-color:#60F;float:left;margin:2px;}
 7 </style>
 8 </head>
 9 
10 <body>
11     <div class="item" onclick="sel(this)"></div>
12     <div class="item" onclick="sel(this)"></div>
13     <div class="item" onclick="sel(this)"></div>
14     <div class="item" onclick="sel(this)"></div>
15     <div class="item" onclick="sel(this)"></div>
16     <div class="item" onclick="sel(this)"></div>
17     <div class="item" onclick="sel(this)"></div>
18     <div class="item" onclick="sel(this)"></div>
19     <div class="item" onclick="sel(this)"></div>
20     <div class="item" onclick="sel(this)"></div>
21     <div class="item" onclick="sel(this)"></div>
22     <div class="item" onclick="sel(this)"></div>
23 </body>
24 <script type="text/javascript">
25 function sel(a){
26     var sy=document.getElementsByClassName("item");
27     for(var i=0;i<sy.length;i++){
28         sy[i].style.backgroundColor="blue";   //先让所有元素变为初始颜色
29     }
30     a.style.backgroundColor="red";   //让该元素选中变色
31 }
32 </script>
33 </html>
posted on 2017-06-19 22:14 为伊消得阅读(159) 评论(0) 收藏举报