if (document.images) {

img1on = new Image(); //On Images
img1on.src = "graphics/sculpture/St_Bonafice-ro.gif";
img2on = new Image();      
img2on.src = "graphics/sculpture/Chandelier-ro.gif";
img3on = new Image();
img3on.src = "graphics/sculpture/Lions_Head_Doorway-ro.gif";
img4on = new Image(); 
img4on.src = "graphics/contact-button-ro.gif";
img5on = new Image(); 
img5on.src = "graphics/1-button-ro.gif";
img6on = new Image();      
img6on.src = "graphics/2-button-ro.gif";
img7on = new Image();
img7on.src = "graphics/3-button-ro.gif";
img8on = new Image(); 
img8on.src = "graphics/4-button-ro.gif";

img1off = new Image(); //off Images
img1off.src = "graphics/sculpture/St_Bonafice-sm.gif";
img2off = new Image();      
img2off.src = "graphics/sculpture/Chandelier-sm.gif";
img3off = new Image();
img3off.src = "graphics/sculpture/Lions_Head_Doorway-sm-2.gif";
img4off = new Image(); 
img4off.src = "graphics/contact-button.gif";
img5off = new Image(); 
img5off.src = "graphics/1-button.gif";
img6off = new Image();      
img6off.src = "graphics/2-button.gif";
img7off = new Image();
img7off.src = "graphics/3-button.gif";
img8off = new Image(); 
img8off.src = "graphics/4-button.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");
        }
}