VB.Net , Can't click button, No ID or Name - html

Question

I am trying to get a balance checker for Adnooka, but I can't even get past the login.
Here's the HTML:
</div>
<div class="control-group row-fluid">
<label class="row-fluid " for="inputPassword">Password <div class="pull-right"><a class="muted"><small><a href='http://adnooka.com/recover'>Forgot your password ?</a></small></a></div></label>
<div class="controls row-fluid input-append">
<input type="password" id="inputPassword" placeholder="Password" name="password" class="row-fluid" value=""> <span class="add-on"><i class="icon-lock"></i></span>
</div>
</div>
<div class="control-group row-fluid fluid">
<div class="controls span6">
</div>
<div class="controls span5 offset1" style=''>
<button type='submit' class="btn btn-default" style='float:right'>Login<i class="gicon-chevron-right"></i></a>
</div>
</div>
But the Button has no ID or Name, how can I click it?
How how can I return the value of a balance?
Here's what I've got so far:
WebBrowser1.Document.GetElementById("email").SetAttribute("value", textbox1.Text)
WebBrowser1.Document.GetElementById("password").SetAttribute("value", pass.Text)
Dim allelements As HtmlElementCollection = WebBrowser1.Document.All
For Each webpageelement As HtmlElement In allelements
If webpageelement.GetAttribute("type") = "submit" Then
webpageelement.InvokeMember("click")
End If
Next
End Sub
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
WebBrowser1.Navigate("http://adnooka.com/login")
End Sub

Answer 1

You can invoke a submit on the form itself, you don't have to find a button to click.
This should work, if you have only one form on the page. If not, adjust the [0] to whatever is needed:
WebBrowser1.Document.Forms[0].InvokeMember("submit")
See http://msdn.microsoft.com/en-us/library/system.windows.forms.htmldocument.forms.aspx for more details.