js选中当前菜单后高亮显示的导航条

<!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 charset="utf-8">
<title>js选中当前菜单后高亮</title>
<style type="text/css">

.nav {
    MARGIN: 1px 0; 
    WIDTH: 100%; 
    FONT-FAMILY: verdana; 
    HEIGHT: 21px; 
    BACKGROUND-COLOR: #970B0B;
    font-family:Arial, Helvetica, sans-serif;
    font-size:12px;
}
.nav UL {
    PADDING: 0px; 
    DISPLAY: block; 
    MARGIN: 0px; 
    LIST-STYLE-TYPE: none; 
    HEIGHT: 21px; 
    BACKGROUND-COLOR: #970B0B;
    COLOR: #ffffff; 
}
.nav LI {
    BORDER-RIGHT: #ffffff 1px solid; 
    DISPLAY: block; 
    FLOAT: left; 
    HEIGHT: 21px;
    font-family:Arial, Helvetica, sans-serif;
    font-size:12px;
}
.nav LI A {
    PADDING:1px 15px 0; 
    DISPLAY: block; 
    FONT-WEIGHT: none; 
    COLOR: #ffffff; 
    LINE-HEIGHT: 20px; 
    TEXT-DECORATION: none;
}
.nav LI A:hover {
    COLOR:#562505; 
    BACKGROUND-COLOR: #f4f524; 
    TEXT-DECORATION: none;
}
.current{
  color:#ffffff;
  background:blue;
}
.nav li#date{
  color:#ffffff;
  PADDING:2px 15px 0; 
}
</style>
<script language="javascript" type="text/javascript">
var  $c=function(array){var nArray = [];for (var i=0;i<array.length;i++) nArray.push(array[i]);return nArray;};
Array.prototype.each=function(func){
for(var i=0,l=this.length;i<l;i++) {func(this[i],i);};
};
document .getElementsByClassName=function(cn){
var hasClass=function(w,Name){
var hasClass = false;
w.className.split(' ').each(function(s){
if (s == Name) hasClass = true;
});
return hasClass;
}; 
var elems =document.getElementsByTagName("*")||document.all;
            var elemList = [];
           $c(elems).each(function(e){
if(hasClass(e,cn)){elemList.push(e);}
           })
        return $c(elemList);
};        
function change_bg(obj){
var a=document.getElementsByClassName("nav")[0].getElementsByTagName("a");
for(var i=0;i<a.length;i++){a[i].className="";}
obj.className="current";
}
</script>
</head>
<body>
<DIV class="nav">
  <UL>
    <LI><A href="#" onclick="change_bg(this)">源码首页</A></LI>
    <LI><A href="#" onclick="change_bg(this)">网页特效</A> </LI>
    <LI><a href="#" class="current" onclick="change_bg(this)">精品源码</a> </LI>
    <LI><A href="#" onclick="change_bg(this)">ASP源码</A> </LI>
    <LI><A href="#" onclick="change_bg(this)">PHP源码</A> </LI>
    <LI><A href="#" onclick="change_bg(this)">JSP源码</A> </LI>
    <LI><A href="#" onclick="change_bg(this)">脚本资源</A> </LI>
    <LI><A href="#" onclick="change_bg(this)">软件下载</A> </LI>
  </UL>
</DIV>
</body>
</html>
原文地址:https://www.cnblogs.com/qhorse/p/4765581.html