CSS换肤技术

<SCRIPT LANGUAGE=javascript>
<!--
function SetCookie(name,value){
 var argv=SetCookie.arguments;
 var argc=SetCookie.arguments.length;
 var expires=(2<argc)?argv[2]:null;
 var path=(3<argc)?argv[3]:null;
 var domain=(4<argc)?argv[4]:null;
 var secure=(5<argc)?argv[5]:false;
 document.cookie=name+"="+escape(value)+((expires==null)?"":("; expires="+expires.toGMTString()))+((path==null)?"":("; path="+path))+((domain==null)?"":("; domain="+domain))+((secure==true)?"; secure":"");
}
 
function GetCookie(Name) {
 var search = Name + "=";
 var returnvalue = "";
 if (document.cookie.length > 0) {
 offset = document.cookie.indexOf(search);
 if (offset != -1) {
 offset += search.length;
 end = document.cookie.indexOf(";", offset);
 if (end == -1)
 end = document.cookie.length;
 returnvalue=unescape(document.cookie.substring(offset,end));
 }
 }
 return returnvalue;
}
 
var thisskin;
thisskin=GetCookie("nowskin");
if(thisskin!="")
 skin.href=thisskin;
else
 skin.href="css.css";
 
function changecss(url){
 if(url!=""){
 skin.href=url;
 var expdate=new Date();
 expdate.setTime(expdate.getTime()+(24*60*60*1000*30));
 //expdate=null;
 //以下设置COOKIES时间为1年,自己随便设置该时间..
 SetCookie("nowskin",url,expdate,"/",null,false);
 }
}
//-->
</SCRIPT>

<P>请选择下面的下拉菜单测试换肤效果</P>
 
<a href=# onclick="changecss('css.css')">css.css</a>
<a href=# onclick="changecss('css1.css')">css1.css</a>
<a href=# onclick="changecss('css2.css')">css2.css</a>
<a href=# onclick="changecss('css3.css')">css3.css</a>
<br>
 
<select onchange="changecss(this.value)">
<option>选择样式单文件</option>
<script language="javascript">
var csss=new Array();
csss[0]="css.css";
csss[1]="css1.css";
csss[2]="css2.css";
csss[3]="css3.css";
var i;
for(i=0;i<4;i++)
 if(thisskin==csss[i])
 document.write("<option value=\""+csss[i]+"\" selected>"+csss[i]+"样式单文件</option>");
 else
 document.write("<option value=\""+csss[i]+"\">"+csss[i]+"样式单文件</option>");
</script>
</select>