JS点击事件 

 1 <!DOCTYPE html>
 2 <html lang="cn">
 3 <head>
 4     <meta charset="UTF-8">
 5     <title>Document</title>
 6     <style>
 7         span{
 8             padding: 5px 10px;
 9             background-color:darkgreen;
10             /* width: 20px; */
11             /* height: 20px; */
12             /* display: block; */
13         }
14     </style>
15     <script type="text/javascript">  
16         window.onload = function() {  
17             var hlist = document.getElementsByTagName('span');  
18             //console.log(hlist.length)               
19             hlist[0].style.backgroundColor = "brown";
20             for (var i = 0; i < hlist.length; i++) {  
21                 var htag = hlist[i];
22                 htag.onclick = function() {  
23                     //alert(this.innerHTML);
24                     setColor(hlist,this.innerHTML - 1);
25                 }
26             }
27         }
28         setColor = function(hlist,index){
29             for(var i = 0; i < hlist.length; i++){
30                 if(index != i){
31                     //hlist[i].setAttribute("class", "a");
32                     hlist[i].style.backgroundColor = "darkgreen";
33                 }else{
34                     //hlist[i].setAttribute("class", "b");
35                     hlist[i].style.backgroundColor = "brown";
36                 }
37             }
38         }
39     </script>
40 </head>
41 <body>
42     <span>1</span>
43     <span>2</span>
44     <span>3</span>
45     <span>4</span>
46     <span>5</span>
47     <span>6</span>
48     <span>7</span>
49     <span>8</span>
50     <span>9</span>
51 </body>
52 </html>

 

posted @ 2018-05-03 11:47  bytmit  阅读(117)  评论(0)    收藏  举报