if (navigator.userAgent == "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.10) Gecko/20050716 Firefox/1.0.6")
{
 window.open ("http://www.genartpulse.net/detect.html",
"mywindow","menubar=1,resizable=1,width=350,height=250");
}