if (document.images) {         					   // Active Images

            img1on = new Image();
            img1on.src = "img/index/hd_whatwedo_x.gif";
            img2on = new Image();
            img2on.src = "img/index/hd_news_x.gif";
			img3on = new Image();
            img3on.src = "img/index/hd_projects_x.gif";
			img4on = new Image();
            img4on.src = "img/tnav/01_home_x.gif";
			img5on = new Image();
            img5on.src = "img/tnav/02_who_x.gif";
			img6on = new Image();
            img6on.src = "img/tnav/03_why_x.gif";
			img7on = new Image();
            img7on.src = "img/tnav/04_contact_x.gif";

            img1off = new Image(); 	
            img1off.src = "img/index/hd_whatwedo.gif";
            img2off = new Image(); 	
            img2off.src = "img/index/hd_news.gif";
			img3off = new Image();
            img3off.src = "img/index/hd_projects.gif";
			img4off = new Image(); 		
            img4off.src = "img/tnav/01_home.gif";
			img5off = new Image(); 	
            img5off.src = "img/tnav/02_who.gif";
			img6off = new Image();
            img6off.src = "img/tnav/03_why.gif";
			img7off = new Image(); 		
            img7off.src = "img/tnav/04_contact.gif";
			}

function imgOn(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "on.src");
        }
}

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