jQuery.preloadImages = function()
{
  for(var i = 0; i<arguments.length; i++)
  {
    jQuery("<img>").attr("src", arguments[i]);
  }
}
$(document).ready(function() {
	$.preloadImages("../images/dropdown-top.png", "../images/dropdown-shadow.png","../images/dropdown-bg.png","../images/nav-hover.png");	
})