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) {
		webdesign_over = newImage("images/webdesign_over.gif");
		drawing_over = newImage("images/drawing_over.gif");
		animation_over = newImage("images/animation_over.gif");
		adbanners_over = newImage("images/adbanners_over.gif");
		resume_over = newImage("images/resume_over.gif");
		education_over = newImage("images/education_over.gif");
		preloadFlag = true;
	}
}