function checkForm(frm)
{
	var resultState = true;
	if (resultState) resultState = checkField(frm.firstName.value, 'string', 'First Name');
    if (resultState) resultState = checkField(frm.lastName.value, 'string', 'Last Name');	
	if (resultState) resultState = checkField(frm.email.value, 'email', 'Email');		

	return resultState;
}