if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4))
          {
            document.write('<link rel=stylesheet type="text/css" href="../css/index.css">');
          }
		  else
		  {		  
			  if ((navigator.appName == "Netscape")) 
			  {
			     document.write('<link rel=stylesheet type="text/css" href="../css/mzindex.css">');
			  } 
			  else 
			  {
				 document.write('<link rel=stylesheet type="text/css"  href="../css/index.css">');
			  }
		  }