function detectMacFF() {
	var userAgent = navigator.userAgent.toLowerCase();
	if (userAgent.indexOf('mac')) {
		if (/Firefox[\/\s](\d+\.\d+)/.test(navigator.userAgent)){
			var ffversion=new Number(RegExp.$1)
			if (ffversion <= 2) return true;
		}
	}
	return false;
}