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


$.preloadImages('images/clients_down.png', 'images/company_down.png', 'images/contactus_down.png', 'images/modules_down.png', 'images/support_down.png','images/webcocart_down.png');

$(document).ready(function() {
  // set up rollover
	$("a.rollover").hover(
		function() {
      var img = $(this).children()[0];
			img.src = img.src.replace("_up","_down");
		},
		function() {
      var img = $(this).children()[0];
			img.src = img.src.replace("_down","_up");
		}
	);

});