function submitform(theform) {
	if (theform.name.value == '') {
		alert ('Please enter your name.');
	}
	else if ((theform.email.value == '') && (theform.phone.value == '')) {
		alert ('Please enter at least a phone number or email address.');
	}
	else if ((theform.email.value != '') && (invalidemail(theform.email.value))) {
		alert ('Please enter a valid email address.');
	}
	else if (theform.description.value == '') {
		alert ('Please enter a remark or question.');
	}
	else {
		theform.submit();
	}
}

function invalidemail (email) {
	AtPos = email.indexOf('@')
	StopPos = email.lastIndexOf('.')
	if (AtPos == -1 || StopPos == -1) {
		return true;
	}
	else {
		return false;
	}
}