B4J Question WebView findAll or other find on the page

#Region Project Attributes
    #MainFormWidth: 600
    #MainFormHeight: 600
#End Region

Sub Process_Globals
    Private fx As JFX
    Private MainForm As Form
    Private xui As XUI
    Private Button1 As B4XView
    Private wv As WebView
End Sub

Sub AppStart (Form1 As Form, Args() As String)
    MainForm = Form1
    MainForm.RootPane.LoadLayout("Layout1")
    MainForm.Show
 
 
    wv.LoadUrl("http://b4x.com")
End Sub

Sub Button1_Click
    ExecuteJavaScript(wv, "window.find('community)")
End Sub


#Region WebView JS
Sub ExecuteJavaScript (wv2 As WebView, script As String) As Object
    Dim jo As JavaObject = wv2
    Return jo.RunMethodJO("getEngine", Null).RunMethod("executeScript", Array(script))
End Sub
#End Region