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) {
		aip_header_03_over = newImage("images/aip_header_03_over.gif");
		aip_header_05_over = newImage("images/aip_header_05_over.gif");
		aip_header_07_over = newImage("images/aip_header_07_over.gif");
		aip_header_12_over = newImage("images/aip_header_12_over.gif");
		aip_header_14_over = newImage("images/aip_header_14_over.gif");
		aip_header_16_over = newImage("images/aip_header_16_over.gif");
		aip_header_18_over = newImage("images/aip_header_18_over.gif");
		aip_header_20_over = newImage("images/aip_header_20_over.gif");
		aip_header_22_over = newImage("images/aip_header_22_over.gif");
		bip_header_03_over = newImage("images/bip_header_03_over.gif");
		bip_header_05_over = newImage("images/bip_header_05_over.gif");
		bip_header_07_over = newImage("images/bip_header_07_over.gif");
		bip_header_12_over = newImage("images/bip_header_12_over.gif");
		bip_header_14_over = newImage("images/bip_header_14_over.gif");
		bip_header_16_over = newImage("images/bip_header_16_over.gif");
		bip_header_18_over = newImage("images/bip_header_18_over.gif");
		bip_header_20_over = newImage("images/bip_header_20_over.gif");
		bip_header_22_over = newImage("images/bip_header_22_over.gif");
		preloadFlag = true;
	}
}