var defaults = { username: true, password: true, searchterms: true };
function clearDefault(type)
{
	if (defaults[type])
	{
		document.getElementById(type).value = '';
		defaults[type] = false;
	}
}

function showInstitution()
{
	if (document.getElementById('academic').checked)
	{ document.getElementById('instrow').style.display = 'block'; }
	else
	{ document.getElementById('instrow').style.display = 'none'; }
}

function validateCRIndexForm()
{
	if (document.getElementById('name').value == '')
	{
		alert('Please provide your name.');
		document.getElementById('name').focus();
		return false;
	}
	
	if (document.getElementById('email').value == '')
	{
		alert('Please provide your email address.');
		document.getElementById('email').focus();
		return false;
	}
	
	if (!document.getElementById('academic').checked &&
			!document.getElementById('family').checked &&
			!document.getElementById('specialist').checked)
	{
		alert('Please provide the reason for your enquiry.');
		return false;
	}
	
	if (document.getElementById('nature').value == '')
	{
		alert('Please provide the nature of your enquiry.');
		document.getElementById('nature').focus();
		return false;
	}
	
	return true;
}