Оформил: DeeCo
Автор: http://www.swissdelphicenter.ch

// If there is only one button, you can do something like: 

WebBrowser1.OleObject.Document.forms.item(0).elements.item(0).click;

 // This will do a click on the first element of the first <FORM>, where an 
// element is either <INPUT>, <SELECT> or <TEXTAREA>. 


// If there is more than one button, you can do something like: 

procedure TForm1.Button1Click(Sender: TObject);
 var
    ovElements: OleVariant;
    i: Integer;
  begin
    ovElements := WebBrowser1.OleObject.Document.forms.item(0).elements;
    for i := 0 to (ovElements.Length - 1) do
     if (ovElements.item(i).tagName = 'INPUT') and
       (ovElements.item(i).type = 'SUBMIT') and
       (ovElements.item(i).Value = 'Recent Charges') then
       ovElements.item(i).Click;
  end;