function openWindow(url,ref,width,height)
{
	// defaults
	if (!ref) var ref = 'myWindow';
	if (!width) var width = '800';
	if (!height) var height = '600';
	
	window.open(url,ref,
	'width = ' + width + ',' +
	'height = ' + height + ',' +
	'resizable = yes,' +
	'scrollbars = yes,' +
	'toolbar = no,' +
	'location = no,' +
	'directories = no,' +
	'status = yes,' +
	'menubar = no'
	); // window.open
}

function verifyCheckbox(box)
{
	if (box.checked == 1)
	{
		return true;
	}
	else
	{
		alert("Sie müssen die Allgemeinen Geschäftsbedingungen gelesen und akzeptiert haben, bevor Sie fortfahren!");
		return false;
	}
}

// for booking permits...
function redirect(index,url)
{
	document.location.href = url+'/amount/'+index;
}