// javascript document
 
  var nav = document.getelementbyid("navi");
  var links = nav.getelementsbytagname("li");
  var lilen = nav.getelementsbytagname("a"); //�жϵ�ַ
  var currenturl = document.location.href;
  var first = 0;
  for (var i=0;i<links.length;i++)
  {
      var linkurl = lilen[i].getattribute("href");
          if(currenturl.indexof(linkurl)!=-1)
              {
              first = i;
              }
  }
  links[first].classname = "navon"; //����������ʽ