// This is a hack for internet explorer to check if the user clicked on a disabled select option
function CartVarSelect(select_obj)
{
	var elem_select = document.getElementById(select_obj);
	var elem_form = document.getElementById('shopping_form');

	if (elem_select.options[elem_select.selectedIndex].disabled) {
		document.getElementById(select_obj).selectedIndex = 0;
		elem_form.submit_btn.disabled = true; // The selected variation is now undefined so we must disable the "Buy" button
		return;
	} else {
		elem_form.a.value = '';
		elem_form.submit_btn.value = "Loading..."; 
		elem_form.submit_btn.disabled = true;
		elem_form.submit();
	}
}