//detect Netscape 4.7+
if (navigator.appName=="Netscape"&&parseFloat(navigator.appVersion)>=4.7){
document.write("<link href='includes/main-firefox.css' rel='stylesheet' type='text/css' />");
<!--Menu System-->
document.write("<script type='text/javascript' src='includes/menu-firefox.js'></script>");
document.write("<link href='includes/menu-firefox.css' rel='stylesheet' type='text/css' />");
<!-- End of Menu System-->
}

if(navigator.userAgent.indexOf("Opera")!=-1){
var versionindex=navigator.userAgent.indexOf("Opera")+6
if (parseInt(navigator.userAgent.charAt(versionindex))>=8){
document.write("<link href='includes/main-firefox.css' rel='stylesheet' type='text/css' />");
document.write("<script type='text/javascript' src='includes/menu-firefox.js'></script>");
document.write("<link href='includes/menu-firefox.css' rel='stylesheet' type='text/css' />");
}
}

if(navigator.userAgent.indexOf("Firefox")!=-1){
var versionindex=navigator.userAgent.indexOf("Firefox")+8
if (parseInt(navigator.userAgent.charAt(versionindex))>=1){
document.write("<link href='includes/main-firefox.css' rel='stylesheet' type='text/css' />");
document.write("<script type='text/javascript' src='includes/menu-firefox.js'></script>");
document.write("<link href='includes/menu-firefox.css' rel='stylesheet' type='text/css' />");
}
}

//Detect IE5.5+
version=0
if (navigator.appVersion.indexOf("MSIE")!=-1){
temp=navigator.appVersion.split("MSIE")
version=parseFloat(temp[1])
}

if (version>=5.5){ //NON IE browser will return 0
document.write("<link href='includes/main.css' rel='stylesheet' type='text/css' />");
document.write("<script type='text/javascript' src='includes/menu.js'></script>");
document.write("<link href='includes/menu.css' rel='stylesheet' type='text/css' />");
}