Android Question catch submit button in webview

 WebViewExtras1.executeJavascript(WebView1,$"
document.getElementById(buttonId).onclick = function(){
document.location.href = "http://stub1";
};
"$)

Sub Globals
 
    Dim wv As WebView
  
End Sub

Sub Activity_Create(FirstTime As Boolean)

    wv.Initialize("webview")
    Activity.AddView(wv,0,0,100%x,100%y)
    wv.LoadUrl("https://www.b4x.com/android/forum/")
  
End Sub

Sub webview_OverrideUrl (Url As String) As Boolean
    If Url.EndsWith("forum/") Then
 
        Return True
'you can do the b4a event here
    Else
       
        Return False
    End If
End Sub