$(function() {
	$('.share_button, .topmenu_button, .mainmenu_button, .senden, .shop_button').mouseover(function() {
		this.src = this.src.replace(".gif","_over.gif");
	}); 
	
	$('.share_button, .topmenu_button, .mainmenu_button, .senden, .shop_button').mouseout(function() {
		this.src = this.src.replace("_over.gif",".gif");
	});  
});

jQuery.preloadImages = function() {
  for (var i = 0; i < arguments.length; i ++) {
    jQuery('<img>').attr('src',arguments[i]);
  }
}