function isMac(){
	return (navigator.appVersion.indexOf("Mac") != -1)
}
function isMSIE(){
	return (navigator.appVersion.indexOf("MSIE") != -1)
}
function isMSIE5(){
	return ((parseInt(navigator.appVersion.substr(navigator.appVersion.indexOf('MSIE') + 4)) >= 5)&&isMSIE())
}
function isNav(){
	return (navigator.appName == "Netscape")
}
function isNav4(){
	return (isNav() && (parseFloat(navigator.appVersion) < 5))
}
if(isMac()){
	if(isNav4() || ((!(isMSIE5()) && isMSIE()))){
			document.write('<link rel="STYLESHEET" type="text/css" href="style/style_mac.css">');
	} else {
			document.write('<link rel="STYLESHEET" type="text/css" href="style/style.css">');
	}
} else {
	if(isNav4()){
			document.write('<link rel="STYLESHEET" type="text/css" href="style/style_netscape.css">');
	} else {
		document.write('<link rel="STYLESHEET" type="text/css" href="style/style.css">');
	}
}