var Appversion = navigator.appVersion.charAt(0);
var Appname = navigator.appName.charAt(0);

with( document ){
	if(navigator.appVersion.indexOf("Mac") > -1){
		if( Appname == "M" ){
			// �� MAC IE
			write('<link rel="stylesheet" type="text/css" href="_res/style_mac.css">');
		}
		else{
			write('<link rel="stylesheet" type="text/css" href="_res/style.css">');
		}
	}
	else{
			write('<link rel="stylesheet" type="text/css" href="_res/style.css">');
	}
}