os= navigator.platform;
mac= "MacPPC";
browser= navigator.appName;
ie= "Microsoft Internet Explorer";
netscape= "Netscape";

 if (os == mac){
	document.write('<link rel="stylesheet" type="text/css" href="/motorize/js_css/mac_all.css">');
}
else if (browser == ie && os != mac){
	document.write('<link rel="stylesheet" type="text/css" href="/motorize/js_css/win_ie.css">');
}
else {
	document.write('<link rel="stylesheet" type="text/css" href="/motorize/js_css/others.css">');
}