KindWizzard

function WatchPropery(watch_object, property_name, callback){
	var current_value = watch_object[property_name],
		old_ie = document.all && document.querySelector && !document.addEventListener || document.all && !document.querySelector;

	// Setter
	function setFunction(value){
		if(current_value !== value){
			current_value = value;
			callback.call(watch_object, current_value)