if (document.images) {
            img1on = new Image();   img1on.src =	"/assets/nav/work1.png";
            img1off = new Image();  img1off.src =	"/assets/nav/work2.png";
            img2on = new Image();   img2on.src =	"/assets/nav/clients1.png";
            img2off = new Image();  img2off.src =	"/assets/nav/clients2.png";
            img3on = new Image();   img3on.src = 	"/assets/nav/profile1.png";
            img3off = new Image();  img3off.src = 	"/assets/nav/profile2.png";
            img4on = new Image();   img4on.src = 	"/assets/nav/contact1.png";
            img4off = new Image();  img4off.src = 	"/assets/nav/contact2.png";
            
            img5on = new Image();   img5on.src = 	"/assets/nav/arrow_l1.jpg";
            img5off = new Image();  img5off.src = 	"/assets/nav/arrow_l2.jpg";
            img6on = new Image();   img6on.src = 	"/assets/nav/arrow_r1.jpg";
            img6off = new Image();  img6off.src = 	"/assets/nav/arrow_r2.jpg";
       
            img7on = new Image();   img7on.src = 	"/assets/nav/arrow_lb1.jpg";
            img7off = new Image();  img7off.src = 	"/assets/nav/arrow_lb2.jpg";
}

// Navigation rollovers

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");}}