function checkAll(form, check_names, value)
{
	for (var c = 0; c < form.elements.length; c++)
	{
		elem = form.elements[c];
		if (elem.name.indexOf(check_names) != -1)
			elem.checked = value;
	}
}


function checked_any(form, check_names)
{
	for (var c = 0; c < form.elements.length; c++)
	{
		elem = form.elements[c];
		if (elem.name.indexOf(check_names) != -1)
			if (elem.checked)
				return true;
	}
	return false;
}

function switchSubscribeForm(form)
{
	form.subscribe_opt[0].disabled 	= !form.subscribe_opt[0].disabled;
	form.subscribe_opt[1].disabled 	= !form.subscribe_opt[1].disabled;
	form.subscribe_limit.disabled 	= !form.subscribe_limit.disabled;
	form.subscribe_edin.disabled 	= !form.subscribe_edin.disabled;
}