if (document.images) {
img2on = new Image();
img2on.src ="http://www.nobluescreens.com/bsod_ani.gif";

img2off = new Image();
img2off.src ="http://www.nobluescreens.com/lower.gif";

}

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

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