mac=(navigator.appVersion.indexOf('Mac')!=-1)?true:false;
ie=(navigator.appName.charAt(0) == "M")?true:false;

document.write("<link rel=\"stylesheet\" type=\"text/css\" href=\"http://www.bounce.com/contents/css/");

if(mac){
	//FOR MAC
	document.write("mac.css");
}
else{
	if(ie){
	//FOR WIN IE
	document.write("win_ie.css");
	}
	else{
	//FOR WIN FF
	document.write("win_ff.css");
	}
}

document.write("\">");