function loginFocus(field) {
	if(!((field.name == 'login' && field.value == 'gebruikersnaam') || (field.name == 'password' && field.value == 'wachtwoord'))) return false;
	field.value = '';
	field.className = 'text';
	if(field.name == 'password') {
		field.type = 'password';
	}
}

function loginBlur(field) {
	if(field.value != '') return false;
	if(field.name == 'login') {
		field.value = 'gebruikersnaam';
	} else {
		field.type = 'text';
		field.value = 'wachtwoord';
	}
	field.className = 'text_description';
}