JavaScript实现导航样式动态变化

在做开发时，遇到“关于我们”页面一个这样的需求，导航样式动态变化   url类似http://rencai.test.com/main.php？module=about#connectus

<li><a href="#about" mce_href="#about" id="aboutNav" onclick="changeNavStyle(this.id)">关于<{$sitename}></a></li> <li><a href="#advertise" mce_href="#advertise" id="advertiseNav" onclick="changeNavStyle(this.id)">广告服务</a></li> <li><a href="#connectus" mce_href="#connectus" id="connectusNav" onclick="changeNavStyle(this.id)">联系我们</a></li> <li><a href="#help" mce_href="#help" id="helpNav" onclick="changeNavStyle(this.id)">帮助中心</a></li> <li><a href="#declare" mce_href="#declare" id="declareNav" onclick="changeNavStyle(this.id)">免责声明</a></li> 

<mce:script type="text/javascript"><!-- var url = window.location; url = url.toString(); var id = url.substr(url.indexOf("#")+1)+"Nav"; changeNavStyle(id); function $(id) { return document.getElementById(id); } function changeNavStyle(id) { var nav = new Array("aboutNav","advertiseNav","connectusNav","helpNav","declareNav"); for(var i=0;i<nav.length;i++) { if(nav[i]==id) { $(id).style.color = "#049"; }else { $(nav[i]).style.color = ""; } } } // --></mce:script>