function swapTab(language) {
	Element.hide("form_nl");
	var tab_nl = get_elm("tab_nl");
	tab_nl.className = "inactive";
	Element.hide("form_en");
	var tab_en = get_elm("tab_en");
	tab_en.className = "inactive";
	Element.hide("form_de");
	var tab_de = get_elm("tab_de");
	tab_de.className = "inactive";
	Element.hide("form_fr");
	var tab_fr = get_elm("tab_fr");
	tab_fr.className = "inactive";
	Element.hide("form_it");
	var tab_it = get_elm("tab_it");
	tab_it.className = "inactive";
	Element.hide("form_p");
	var tab_p = get_elm("tab_p");
	tab_p.className = "inactive";
	
	Element.show("form_" + language);
	var tab_active = get_elm("tab_" + language);
	tab_active.className = "active";
}

function price2str(price, separator) {
	var price1 = Math.floor(price / 100);
	var price2 = (price % 100 < 10) ? ("0" + (price % 100)) : (price % 100);
	
	return price1 + separator + price2;
}