function upd() {
var e=document.forms[1].UsernameInput.value;
e=e.replace("@","+");	
document.forms[1].Username.value=e;
}
function Login() {
if (document.forms[0].UsernameInput.value=="") {
alert('Username is blank.'); }
else {
if (document.forms[0].Password.value=="") {
alert('Password is blank.'); }
else {
}
document.forms[1].submit();
}
}