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) {	
		logo_rollshadowover = newImage("/images-site2/images/logoroll-over.jpg");
		preloadFlag = true;
	}
}