function sniff(){
    this.ie = (navigator.appName == "Microsoft Internet Explorer");
    this.ns = (navigator.appName == "Netscape");
    this.op = (navigator.appName == "Opera");
  }
  var is = new sniff();
//alert("IE4:"+is.ie4+"\nIE5:"+is.ie5+"\nIE6:"+is.ie6+"\navigator.userAgent");
if(is.ie){document.write('<link rel="stylesheet" href="css/absolute.css" type="text/css">');
}
if(is.ns){document.write('<link rel="stylesheet" href="css/absolutens.css" type="text/css">');
}
if(is.op){document.write('<link rel="stylesheet" href="css/absolute.css" type="text/css">');
}