function show(id) {
	document.getElementById(id).style.visibility = "visible";
}
function hide(id) {
	document.getElementById(id).style.visibility = "hidden";
}

function sizetest() {
if (nosize){
	show('btn_warenkorb2');
	}
	else
	{
	show('btn_warenkorb3');
	}
}

function checkForm(form)
{

if (nosize) {
	var element = form.size.selectedIndex;
	if (form.size.options[element].value != 0 && form.qty.value > 0) {
		show('btn_warenkorb3');
		}
	else {
		hide('btn_warenkorb3');
		show('btn_warenkorb2');
		}
} else {

if (form.qty.value > 0) {
		show('btn_warenkorb3');
		}
	else {
		hide('btn_warenkorb3');
		show('btn_warenkorb2');
		}
}

}