function checkEmail(txtobj, errobj, doalert)
{
	var x = txtobj.value;
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (!filter.test(x))
	{
		errobj.innerHTML='There is a problem with this email address.';
		if (doalert) alert('Problem with email address.  Please recheck it.');
		return false;
	}
	else
	{
		errobj.innerHTML=' ';
		return true;
	}
}