对动态导航进行当前页面的标识的解决办法

 1 /**
 2  * Created by zhenxin on 2015/10/29.
 3  */
 4 function changeNav(){
 5     if(!document.getElementById) return false;
 6     if(!document.getElementById("aboutlist")) return false;
 7     var aboutList =  document.getElementById("aboutlist");
 8     var links = aboutList.getElementsByTagName("a");
 9     var lists = aboutList.getElementsByTagName("li");
10     for(var i = 0; i<links.length; i++){
11         var linkurl = links[i].getAttribute("href");
12         var currenturl = window.location.href;
13         if(currenturl.indexOf(linkurl) != -1){
14             addClass(lists[i],"currclass")
15         }
16     }
17 
18 }
19 function addClass(element,value){
20     if(!element.className){
21         element.className = value;
22     }else{
23         newClassName = element.className;
24         newClassName += " ";
25         newClassName += value;
26         element.className = newClassName;
27     }
28 }
29 function addLoadEvent(func){
30     var oldonload = window.onload;
31     if (typeof window.onload != ‘function‘){
32         window.onload = func;
33     }else {
34         window.onload = function(){
35             oldonload();
36             func();
37         }
38     }
39 }
40 addLoadEvent(changeNav);