ASP.NET 客户端事件中的密码和确认

>我有 2 个 ASPxTextBox、ASPxValidationSummary 和 ASPxButton
在JS文件中有OnPasswordValidation函数
但是当我输入密码时，然后单击选项卡按钮设置是有效的（假）
在txt_password控件不起作用，但它适用于txt_ConfirmPassword

为什么？

<dx:ASPxTextBox ID="txt_password" runat="server" Password="true" AssociatedControlID="txt_password">
    <ClientSideEvents Validation="OnPasswordValidation" />
</dx:ASPxTextBox>
<dx:ASPxTextBox ID="txt_ConfirmPassword" runat="server" Password="true" AssociatedControlID="txt_ConfirmPassword">
    <ClientSideEvents Validation="OnPasswordValidation" />
</dx:ASPxTextBox>
<dx:ASPxButton ID="btnSubmit" runat="server" Text="Submit" ClientInstanceName="btnSubmit" onclick="btnSubmit_Click" AutoPostBack="False">
<ClientSideEvents Click="function(s, e) {onClickBtnSubmit();}"/>
</dx:ASPxButton>
function OnPasswordValidation(s, e) {
    var objpassword = GetObj('txt_password');
    var objConfirmPassword = GetObj('txt_ConfirmPassword');
    var password = aspxGetControlCollection().Get(objpassword.id);
    var ConfirmPassword = aspxGetControlCollection().Get(objConfirmPassword.id);
    if (password.GetValue() == null) {
        password.SetIsValid(false);
        ConfirmPassword.SetIsValid(false);
        return;
    }
    if (ConfirmPassword.GetValue() == null) {
        password.SetIsValid(false);
        ConfirmPassword.SetIsValid(false);
        return;
    }
    if (password.GetValue().length > 5 || ConfirmPassword.GetValue().length > 5) {
        if (password.GetValue() == ConfirmPassword.GetValue()) {
            password.SetIsValid(true);
            ConfirmPassword.SetIsValid(true);
        }
        else {
            password.SetIsValid(false);
            ConfirmPassword.SetIsValid(false);
            password.SetErrorText = "Password must equal with Confirm Password";
            ConfirmPassword.SetErrorText = "Password must equal with Confirm Password";
        }
    }
    else {
        ConfirmPassword.SetIsValid(false);
        password.SetIsValid(false);
    }
}