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

$.preloadImages("/_images-portfolio/Furniturea/Port-Furniturea-01.jpg", "/_images-portfolio/Furniturea/Port-Furniturea-02.jpg", "/_images-portfolio/Furniturea/Port-Furniturea-03.jpg");