function validateForm()
{
	if(document.getElementById('id_forename').value == '')
	{
		document.getElementById('alert').innerHTML = 'You must enter a forename';
		document.getElementById('alert').style.display = '';
		return false;
	}
	if(document.getElementById('id_surname').value == '')
	{
		document.getElementById('alert').innerHTML = 'You must enter a surname';
		document.getElementById('alert').style.display = '';
		return false;
	}
	if(document.getElementById('id_phone').value == '' && document.getElementById('id_mobile').value == '')
	{
		document.getElementById('alert').innerHTML = 'You must enter a telephone number';
		document.getElementById('alert').style.display = '';
		return false;
	}
	return true;
}
function hideother() {
	document.getElementById('showother').style.display = 'none';
}

function showtime() {
	if(document.getElementById('id_sales').checked)
		document.getElementById('timeshow').style.display = '';
	else
		document.getElementById('timeshow').style.display = 'none';
}

function showother() {
	if(document.getElementById('id_heard').options[document.getElementById('id_heard').selectedIndex].value == '9')
		document.getElementById('showother').style.display = '';
	else
		document.getElementById('showother').style.display = 'none';
}