function clearField(whichfield,checkval)
{
	if (whichfield.value == checkval)
	{
		whichfield.value = '';
	}
}

function validateEmail(whichfield)
{
	var re = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
	if (whichfield.value.match(re))
	{
		alert('Please enter a valid email address.');
		return false;
	}
	else
	{
		return true;
	}
}