document.sendin.username.value = document.login.username.value;

document.sendin.username.value = document.login.username.value.trim();

function doLogin() {

if (!/^[a-z0-9]+$/.test(document.login.username.value)) { 
	alert("ERROR: Username must only contain lower case letters and numbers!");
	document.login.username.focus();
	return false;
}

document.sendin.username.value = document.login.username.value;
document.sendin.password.value = hexMD5('$(chap-id)' + document.login.password.value + '$(chap-challenge)');
document.sendin.submit();
return false;
}