var addBeforeUnload = {};
	
	addBeforeUnload.setEvent = function( func ){
		if(window.addEventListener){
			window.addEventListener('beforeunload', func, false);
		} else {
			window.attachEvent('onbeforeunload', func);
		}
	}
	
	addBeforeUnload.mes = function( mes ){
		this.setEvent(function(event){
			event = event || window.event;
			return event.returnValue = mes;
		});
	}

	addBeforeUnload.func = function( func ){
		this.setEvent(func);
	}