/******************************************************************
	Image Rollovers
	******************************************************************/
	
	var strImagePath = "images/";

	function newImage(strFilename) {
		strFilename = strImagePath + strFilename;
		if (document.images) {
			objTempImage = new Image();
			objTempImage.src = strFilename;
			return objTempImage;
		}
	}

	home = newImage("nav-home.gif");
	homeOver = newImage("nav-home-over.gif");
	
	about_us = newImage("nav-about_us.gif");
	about_usOver = newImage("nav-about_us-over.gif");
	
	publications = newImage("nav-publications.gif");
	publicationsOver = newImage("nav-publications-over.gif");
	
	solutions = newImage("nav-solutions_to_selected_problems.gif");
	solutionsOver = newImage("nav-solutions_to_selected_problems-over.gif");
	
	errata = newImage("nav-errata_omissions.gif");
	errataOver = newImage("nav-errata_omissions-over.gif");
	
	links = newImage("nav-links.gif");
	linksOver = newImage("nav-links-over.gif");
	
	contact_us = newImage("nav-contact_us.gif");
	contact_usOver = newImage("nav-contact_us-over.gif");
	
	function changeImage(strLocation, strImage) {
		document.images[strLocation].src = eval(strImage + ".src");
	}