browser.php
public function clickSubmitByName($name, $additional = false)
    {
        if (! ($form = $this->page->getFormBySubmit(new SelectByName($name)))) {
            return false;
        }
        $success = $this->load(
                $form->getAction(),
                $form->submitButton(new SelectByName($name), $additional));

        return ($success ? $this->getContent() : $success);
    }
public function clickSubmitByName($name, $additional = false)
    {
        if (! ($form = $this->page->getFormBySubmit(new SelectByName($name)))) {
            return false;
        }
        $success = $this->load(
                $form->getAction(),
                $form->submitButton(new SelectByName($name), $additional));

        return ($success ? $this->getContent() : $success);
    }
Clicks the submit button by name attribute. The owning form will be submitted by this.

@param string $name     Button name.
@param hash $additional Additional form data.

@return string/boolean  Page on success.