function changeImage(img_name, actual_image) {
        document[img_name].src = actual_image;
  }


function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

var preloadFlag = false;

function preloadImages() {
	if (document.images) {
		firm = newImage("Portals/7/Skins/EDTN-EF-Prime/images/nav_firm_on.gif");
		erisa = newImage("Portals/7/Skins/EDTN-EF-Prime/images/nav_erisa_on.gif");
		resources = newImage("Portals/7/Skins/EDTN-EF-Prime/images/nav_resources_on.gif");
		attorneys = newImage("Portals/7/Skins/EDTN-EF-Prime/images/nav_attorneys_on.gif");
		cases = newImage("Portals/7/Skins/EDTN-EF-Prime/images/nav_cases_on.gif");
		other = newImage("Portals/7/Skins/EDTN-EF-Prime/images/nav_other_on.gif");
		preloadFlag = true;
	}
}