Effect.OpenList = function (element){
	var element = $(element);
	new Effect.SlideDown(element, arguments[1] || {});
}

Effect.CloseList = function (element){
	var element = $(element);
	new Effect.SlideUp(element, arguments[1] || {});
}

Effect.ToggleList = function (element){
	var element = $(element);
	var tab = $('change_city_tab');
	
	if(element.style.display == "none"){
		tab.src = "img/change_city_tab_invert.png";
		new Effect.OpenList(element, arguments[1] || {});
	}
	else {
		tab.src = "img/change_city_tab.png";
		new Effect.CloseList(element, arguments[1] || {});
	}
}