function checkForm(whichForm) {
	if (whichForm.username.value == "") {
		alert('Please enter your name.  Thank you.');
		whichForm.username.focus();
		return false; 
	}
	if (whichForm.message.value == "") {
		alert('Please enter a message.  Thank you.');
		whichForm.message.focus();
		return false; 
	}
}