if (document.all) {
        document.writeln ('<link rel="stylesheet" type="text/css" href="/bibs/ie.css">');			//Internet Explorer Detected
      }
      else if (document.layers) {
        document.writeln ('<link rel="stylesheet" type="text/css" href="/bibs/netscape.css">');		//Netscape Navigator Detected
      }
      else if (document.getElementById) {
	  //alert ('6');
        document.writeln ('<link rel="stylesheet" type="text/css" href="/bibs/netscape6.css">');	//Netscape 6 Detected
      }
      else {
        document.writeln ('<link rel="stylesheet" type="text/css" href="/bibs/other.css">');      	//Unrecognized Browser Detected
      }