How do I find the password in an <input> tag?

In need to be able to tell which <input> tags have the 'password' type.

ex:
<input type="password" name="password" size="12">

Here is what  I have, but I have something wrong...

                    Dim htmlCollection As HtmlElementCollection = WebBrowser.Document.GetElementsByTagName("INPUT")
                    For Each elem As HtmlElement In htmlCollection
                        Dim ElemName As String
                        ElemName = elem.GetAttribute("password")
                        'elem.SetAttribute("password", Trim(strPassword))
                        'MessageBox.Show(elem.TagName, elem.)
                        If elem.GetAttribute("password") = "" Then
                            WebBrowser.Document.All(elem.Name).InnerText = Trim(strPassword)
                            bPassword = True
                            Exit For
                        End If
                    Next

Thanks!