if (document.images) {

homeoff = new Image();
homeoff.src = "../images/navigation/home_off.gif";
homeover = new Image();
homeover.src = "../images/navigation/home_over.gif";

aboutoff = new Image();
aboutoff.src = "../images/navigation/about_off.gif";
aboutover = new Image();
aboutover.src = "../images/navigation/about_over.gif";

contactoff = new Image();
contactoff.src = "../images/navigation/contact_off.gif";
contactover = new Image();
contactover.src = "../images/navigation/contact_over.gif";

work_completedoff = new Image();
work_completedoff.src = "../images/navigation/work_completed_off.gif";
work_completedover = new Image();
work_completedover.src = "../images/navigation/work_completed_over.gif";

photo_galleryoff = new Image();
photo_galleryoff.src = "../images/navigation/photo_gallery_off.gif";
photo_galleryover = new Image();
photo_galleryover.src = "../images/navigation/photo_gallery_over.gif";

servicesoff = new Image();
servicesoff.src = "../images/navigation/services_off.gif";
servicesover = new Image();
servicesover.src = "../images/navigation/services_over.gif";

questionsoff = new Image();
questionsoff.src = "../images/navigation/questions_off.gif";
questionsover = new Image();
questionsover.src = "../images/navigation/questions_over.gif";

erosionoff = new Image();
erosionoff.src = "../images/navigation/erosion_off.gif";
erosionover = new Image();
erosionover.src = "../images/navigation/erosion_over.gif";

helpful_linksoff = new Image();
helpful_linksoff.src = "../images/navigation/helpful_links_off.gif";
helpful_linksover = new Image();
helpful_linksover.src = "../images/navigation/helpful_links_over.gif";

processoff = new Image();
processoff.src = "../images/navigation/process_off.gif";
processover = new Image();
processover.src = "../images/navigation/process_over.gif";

affiliationsoff = new Image();
affiliationsoff.src = "../images/navigation/affiliations_off.gif";
affiliationsover = new Image();
affiliationsover.src = "../images/navigation/affiliations_over.gif";


}


function over(imgname) {
	if (document.images) {
	document[imgname].src = eval(imgname + "over.src");
	}
}


function off(imgname) {
	if (document.images) {
	document[imgname].src = eval(imgname + "off.src");
	}
}