B4J Question How add Value attribute to Input?

js.evalString("doc.getElementById('LoginPh').value = 'plant';")

#Region  Project Attributes
    #MainFormWidth: 800
    #MainFormHeight: 650
#End Region

Sub Process_Globals
    Private fx As JFX
    Private MainForm As Form
    Private we,temp As JavaObject
    Private wv1 As WebView
    Private startPage As String = "http://111.111.111.111"
    Private doc As JavaObject        ' JavaObject library
    Private js As jScriptEngine     ' jScriptengine library
   
    Dim codigo As String
    Private corr As TextField
    Private grado As TextField
    Private grado As TextField
    Private almidon As TextField
    Private conv1 As TextField
    Private cliente1 As TextField
    Private mat1 As TextField
    Private conv2 As TextField
    Private cliente2 As TextField
    Private mat2 As TextField

End Sub

Sub AppStart (Form1 As Form, Args() As String)
    MainForm = Form1
    we.InitializeNewInstance("javafx.scene.web.WebEngine",Null)
    doc.InitializeStatic("org.w3c.dom.Document")
    MainForm.RootPane.LoadLayout("principal") 'Load the layout file.
    temp = wv1
    we = temp.RunMethod("getEngine",Null)
    wv1.Enabled = True
    wv1.Visible = True
    we.RunMethod("load",Array As Object(startPage))
   

    MainForm.Show
End Sub

Sub wv1_PageFinished (Url As String)
    js.enginePut("doc",we.RunMethod("getDocument",Null))
    js.evalString("var t = doc.body.innerHTML;")
    js.evalString("doc.getElementById('LoginPh').value = 'plant';")
    js.evalString("doc.getElementById('PasswordPh').value = 'plant';")
    js.evalString("doc.getElementById('btnlogin').click();")
   
   
End Sub