function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		id1_over = newImage("shared/1b.jpg");
		id2_over = newImage("shared/2b.jpg");
		id3_over = newImage("shared/3b.jpg");
		id4_over = newImage("shared/4b.jpg");
		id5_over = newImage("shared/5b.jpg");
		id6_over = newImage("shared/6b.jpg");
		id7_over = newImage("shared/7b.jpg");
		id8_over = newImage("shared/8b.jpg");
		id9_over = newImage("shared/9b.jpg");
		id10_over = newImage("shared/10b.jpg");
		id11_over = newImage("shared/11b.jpg");
		id12_over = newImage("shared/12b.jpg");
		preloadFlag = true;
	}
}