function img_preload() {
// arguments[0] = relative path to load images from (required)
// arguments[1-n] are file names of images
    // Check that browser supports image objects
    if (document.images) {
        // Create array of file names of images to be preloaded
        arImageSrc = new Array ();
        for (i = 1; i < arguments.length; i++) {
            var less_i = i - 1;
            arImageSrc[less_i] = arguments[i];
        }
        // Loop through array of image file names
        arImageList = new Array ();
        for (counter in arImageSrc) {
            // Preload by creating image objects and setting their src
            arImageList[counter] = new Image();
            arImageList[counter].src = arguments[0] + arImageSrc[counter];
        }
    }
    return true;
}

function img_rollover(id, src) {
// id = id of image to change, src = path + filename to change image to
    // Filter out browsers without image scripting support
    if (document.images) {
    	document.images[id].src = src;
	}
	return true;
}