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

$.preloadImages('/rentals/resources/images/template2/menu/rollover/menu_shop.png','/sites/all/themes/sephra/images/template2/menu/rollover/menu_commercial.png','/sites/all/themes/sephra/images/template2/menu/rollover/menu_household.png','/sites/all/themes/sephra/images/template2/menu/rollover/menu_chocolate.png','/sites/all/themes/sephra/images/template2/menu/rollover/menu_international.png','/sites/all/themes/sephra/images/template2/menu/rollover/menu_rentals.png','/sites/all/themes/sephra/images/template2/menu/rollover/menu_support.png');