function clearfields() {
	document.loginform.PASSWORD.value="";
	document.loginform.USERNAME.value="";
}

function checkprefix() {
	var txt_username = document.loginform.USERNAME.value;
	if ( (txt_username.indexOf('AA') < 0) && (txt_username.indexOf('aa') < 0) ) {
		document.loginform.USERNAME.value = 'AA' + document.loginform.USERNAME.value;
	} 
	setTimeout('clearfields()',1000);
}

function alert_offline() {
	alert('This dispenser is currently offline.');
	clearfields();
}