function validate()
{
	// Must select a city
	var city = false
	for (i=1;i<17;i++)
	{
		if (i == 11) continue;
		if (document.getElementById('city'+i).checked)
		{
			city = true;
		}
	}

	if (!city)
	{
		alert("Please select a city");
		document.getElementById('city').style.color = 'red';
		return false;
	}

	// Must select a type
	var type = false
	for (i=1;i<4;i++)
	{
		if (document.getElementById('type'+i).checked)
		{
			type = true;
		}
	}

	if (!type)
	{
		alert("Please select a type");
		document.getElementById('type').style.color = 'red';
		return false;
	}

	// Must have a Price
	if (document.getElementById('price_min').value == '' && document.getElementById('price_max').value == '')
	{
		alert("Please select a minimum or maximum price");
		document.getElementById('pmin').style.color = 'red';
		document.getElementById('pmax').style.color = 'red';
		return false;
	}

}