jQuery.preloadImages = function()
{
  for(var i = 0; i<arguments.length; i++)
  {
    jQuery("<img>").attr("src", arguments[i]);
  }
}
$.preloadImages("../../images/navHome_on.gif","../../images/navAll_on.gif","../../images/navBusiness_on.gif","../../images/navAbout_on.gif","../../images/navKnowledge_on.gif","../../images/navNews_on.gif");