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) {
		abouto = newImage("images/abouto.png");
		fisho = newImage("images/fisho.png");
		methodso = newImage("images/methodso.png");
		newso = newImage("images/newso.png");
		recipeso = newImage("images/recipeso.png");
		contacto = newImage("images/contacto.png");
		preloadFlag = true;
	}
}