if (document.images) {

adventures1 = new Image();	adventures1.src =   "images/graphics/adventures1.gif";
adventures0 = new Image();	adventures0.src =   "images/graphics/adventures0.gif";
aboutus1 = new Image();	aboutus1.src =   "images/graphics/aboutus1.gif";
aboutus0 = new Image();	aboutus0.src =   "images/graphics/aboutus0.gif";
gallery1 = new Image();	gallery1.src =   "images/graphics/gallery1.gif";
gallery0 = new Image();	gallery0.src =   "images/graphics/gallery0.gif";
contact1 = new Image();	contact1.src =   "images/graphics/contact1.gif";
contact0 = new Image();	contact0.src =   "images/graphics/contact0.gif";
}

function turnOn(imageName) {
if (document.images) {
document.images[imageName].src = eval(imageName + "1.src");
}

}

function turnOff(imageName) {
if (document.images) {
document.images[imageName].src = eval(imageName + "0.src");
}
}