var _url = window.location.href;
 
     if(_url.lastIndexOf("default")!=-1) document.getElementById("navdefault").className="hover";
     else  if(_url.lastIndexOf("News")!=-1) document.getElementById("navNews").className="hover";
      else  if(_url.lastIndexOf("class")!=-1) document.getElementById("navclass").className="hover";
       else  if(_url.lastIndexOf("about")!=-1) document.getElementById("navabout").className="hover";
        else  if(_url.lastIndexOf("message")!=-1) document.getElementById("navmessage").className="hover";
         else  if(_url.lastIndexOf("qa")!=-1) document.getElementById("navqa").className="hover";
         else  if(_url.lastIndexOf("bbs")!=-1) document.getElementById("navbbs").className="hover";