var br
if(navigator.appName == "Netscape" && navigator.appVersion.charAt(0)=="4"){br="N";}
else if(navigator.appName == "Microsoft Internet Explorer" && document.all != null){br="IE";}
else if(navigator.appName == "Netscape" && document.getElementById != null && navigator.appVersion.charAt(0)=="5"){br="IE";}
else{br="IE";}