var images= ['img/button_back.png','img/button_back_hover.png','img/button_events.png','img/button_events_hover.png','img/button_friends.png','img/button_friends_hover.png','img/button_left.png','img/button_left_hover.png','img/button_right.png','img/button_right_hover.png'];
for(var i =0; i<images.length; i++){
	var t = new Image();
	t.src = images[i];
}