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) {
		about_us_over = newImage("http://www.semantech.com/images/en/about_us_over.gif");
		services_over = newImage("http://www.semantech.com/images/en/services_over.gif");
		translation_over = newImage("http://www.semantech.com/images/en/translation_over.gif");
		editing_over = newImage("http://www.semantech.com/images/en/editing_over.gif");
		technical_writing_over = newImage("http://www.semantech.com/images/en/technical_writing_over.gif");
		temporary_replacement_over = newImage("http://www.semantech.com/images/en/temporary_replacement_over.gif");
		opportunities_over = newImage("http://www.semantech.com/images/en/opportunities_over.gif");
		quotations_over = newImage("http://www.semantech.com/images/en/quotations_over.gif");
		faq_over = newImage("http://www.semantech.com/images/en/faq_over.gif");
		contact_over = newImage("http://www.semantech.com/images/en/contact_over.gif");
		preloadFlag = true;
	}
}