<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>