function PasswordCheckValidator(psw1ID, psw2ID) {
    var rtb1 = Sys.Extended.UI.TextBoxWrapper.get_Wrapper(document.getElementById(psw1ID));
    var rtb2 = Sys.Extended.UI.TextBoxWrapper.get_Wrapper(document.getElementById(psw2ID));
    if (rtb1.get_Value() != rtb2.get_Value()) return "Passwords are not equal";
    return "";
}