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) {
      alphabetical_hm_over = newImage("img/parchbtn-hm-over.gif");
      alphabetical_az_over = newImage("img/parchbtn-az-over.gif");
		alphabetical_smry_over = newImage("img/parchbtn-smry-over.gif");
		alphabetical_bb_over = newImage("img/parchbtn-bb-over.gif");
		alphabetical_wr_over = newImage("img/parchbtn-wr-over.gif");
		alphabetical_panb_over = newImage("img/parchbtn-panb-over.gif");
		alphabetical_irish_over = newImage("img/parchbtn-irish-over.gif");
		alphabetical_tree_over = newImage("img/parchbtn-tree-over.gif");
		preloadFlag = true;
	}
}