if(navigator.appName == "Netscape")
   {
   // alert("You're using a Netscape browser.")
    document.getElementById("browserHgt").className="heightNetmore";
   }
   else if(navigator.appName == "Opera")
   {
    document.getElementById("browserHgt").className="heightOperamore";
    //alert("You're using a Opera browser.")
   }
   else
   {
   	 document.getElementById("browserHgt").className="heightIEmore";
	 //alert("You're using a default browser.")
   }