if (document.images) {

img1on = new Image(); //On graphics
img1on.src = "graphics/about-ro.gif";
img2on = new Image();      
img2on.src = "graphics/sbirt-ro.gif";
img3on = new Image();      
img3on.src = "graphics/how_much-ro.gif";
img4on = new Image();
img4on.src = "graphics/reducing-ro.gif";
img5on = new Image();      
img5on.src = "graphics/facts-ro.gif";

img6on = new Image(); //On graphics
img6on.src = "graphics/provider-ro.gif";
img7on = new Image();
img7on.src = "graphics/press-ro.gif";
img8on = new Image();
img8on.src = "graphics/results-ro.gif";
img9on = new Image();
img9on.src = "graphics/partners-ro.gif";
img10on = new Image();
img10on.src = "graphics/resources-ro.gif";
img11on = new Image();
img11on.src = "graphics/contact-ro.gif";



img1off = new Image(); //Off graphics
img1off.src = "graphics/about.gif";
img2off = new Image();      
img2off.src = "graphics/sbirt.gif";
img3off = new Image();      
img3off.src = "graphics/how_much.gif";
img4off = new Image();
img4off.src = "graphics/reducing.gif";
img5off = new Image();      
img5off.src = "graphics/facts.gif";

img6off = new Image(); //Off graphics
img6off.src = "graphics/provider.gif";
img7off = new Image();
img7off.src = "graphics/press.gif";
img8off = new Image();
img8off.src = "graphics/results.gif";
img9off = new Image();
img9off.src = "graphics/partners.gif";
img10off = new Image();
img10off.src = "graphics/resources.gif";
img11off = new Image(); 
img11off.src = "graphics/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");
        }
}