Programatically Press Submit Button on HTML Form

Can some tell me how to press a button on a HTML form through my program. I have tried:

doc.forms(0).submit

which works, but does not emulate the exact procedure like I need it to do.

Here is the code for the button:

<input type="Image" name="submit" src="http://...submit.gif" border="0">

Thanks

What part of the procedure is being left out? I don't think I'm following.

Using the doc.forms(0).submit works, but not the same as actually pressing the submit button. That is the returned URL that qualifies whether or not the submission was successful is different. It doesn't matter though I ended up just tabbing through the page with SendKeys and it works fine.