function changeClass(id, newClass, exception) {
	if (document.getElementById(id).className != exception) document.getElementById(id).className = newClass;
}
function switchTab(el, tab, tab_type, upload_type, product_id) {
	if (document.getElementById(el).className == "tabSelected") return;
	var tabs = document.getElementsByTagName("li");
	for(i = 0; i < tabs.length; i++) {
		if (tabs[i].className == "tabSelected") tabs[i].className = "tab";
	}
	document.getElementById(el).className = "tabSelected";
	printTabContent(tab, tab_type, upload_type, product_id);
}
function printTabContent(t, type, upload, p) {
	xajax_printTabContent(t, type, upload, p);
}