orderform_off = new Image();
orderform_off.src = "img/productorderform.gif";
orderform_on = new Image();
orderform_on.src = "img/productorderform-over.gif";

article_off = new Image();
article_off.src = "img/articlelink.gif";
article_on = new Image();
article_on.src = "img/articlelink-over.gif";

function navChange(button,mode) {
	document[button].src = eval(button + "_" + mode + ".src");
}