var e = body.getElementsByTagName('SPAN');
for(var i= 0 ; i < e.length; i++){
    if (e[i].id == 'dd'){
      alert(e[i].value);
    }
}

Private Function GetTableRowCount(ByVal TableID As String) As Integer
    Dim Count As Integer =  0 

    If (WebBrowser1.Document IsNot Nothing) Then

        Dim TableElem As HtmlElement = WebBrowser1.Document.GetElementById(TableID)
        If (TableElem IsNot Nothing) Then
            For Each RowElem As HtmlElement In TableElem.GetElementsByTagName("TR")
                Count = Count +  1 
            Next
        Else
            Throw (New ArgumentException("No TABLE with an ID of " & TableID & " exists."))
        End If
    End If
    GetTableRowCount = Count
End Function