function validate_region() {
	var selected_region = false;
	$("input[@name=region]").each(function(i){
  	if($(this).attr('checked') == true) {
			selected_region = true;
		}
	});
	if(selected_region == false) {
		alert('You have to choose a delivery region!');
		return false;
	}
	else {
		return true;
	}
}

function use_payment_method(method) {
	if(method == 'paypal') {
		$('#form_1').attr('action', 'https://www.paypal.com/pl/cgi-bin/webscr');
	}
	$('#form_1').submit();
}

function validate_required() {
	var valid = 0;
	$("input.required").each(function(i){
  	if($(this).val().length > 0) {
			valid++;
		}
	});
	if(valid != $("input.required").length) {
		alert('Please enter all the required information!');
		return false;
	}
	else {
		return true;
	}
}