datagrid validation with Ajax

Hi,

I have a template in a datagrid with a save button. I want to put ajax validation on the button, at the moment I just have ....
        Dim oSaveButton As Button = New Button()
        oSaveButton.CssClass = "tdText"
        oSaveButton.OnClientClick = "grid1.save();return false"
        oSaveButton.Text = "Save"
Which works fine, but does not validate, I have some dialogue code that opens validation dialogue, but I cannot seem to integerate with my button.. the code is below..
    Protected Sub btnSubmit_Click(ByVal o As Object, ByVal e As EventArgs) Handles btnSubmit.Click
        If (txtName.Text.Trim() = "") Then
            myDialog.Visible = True
            myDialog.VisibleOnLoad = True
        Else
            myDialog.Visible = False
            Response.Write("Your name [" & txtName.Text & "] has been submitted")
        End If
    End Sub

If anyone could help I would be very grateful.

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