// detect browser
if ((navigator.appName=="Netscape")&&(parseInt(navigator.appVersion)==4)) var brow = "NS4";
else if ((navigator.appName=="Netscape")&&(parseInt(navigator.appVersion)>4)) var brow = "NS6";
else if (navigator.appName.indexOf("Microsoft") > -1) var brow = "IE";
else var brow = "unk";