禁用浏览器alert

//重置浏览器自带的alert
(function(){
	var _alert = window.alert;
	uiAlert.MyAlert = function(o){
		document.write(o);
	};
	uiAlert.MyAlert.noConflict = function(){
		window.alert = _alert;
	};
	window.alert = window.uiAlert.MyAlert = uiAlert.MyAlert;
})();