change submit type to href with onclick

hello, i am new in contao , i would like to know if there is a way to change the submit filed in a form with a

i have the code from modules/frontend/FormSubmit.php

Code:

---

        public function generate()
        {
                if ($this->imageSubmit && is_file(TL_ROOT . '/' . $this->singleSRC))
                {
                        return sprintf('<input type="image" src="%s" id="ctrl_%s" class="submit%s" alt="%s" value="%s"%s />',
                                                        $this->singleSRC,
                                                        $this->strId,
                                                        (strlen($this->strClass) ? ' ' . $this->strClass : ''),
                                                        specialchars($this->slabel),
                                                        specialchars($this->slabel),
                                                        $this->getAttributes());
                }

                return sprintf('<input type="submit" id="ctrl_%s" class="submit%s" value="%s"%s />',
                                                $this->strId,
                                                (strlen($this->strClass) ? ' ' . $this->strClass : ''),
                                                specialchars($this->slabel),
                                                $this->getAttributes());
        }

---

the question is how can i get the from id that has the submit button ? somthing like "$this->formid" ... is this possible?
class FormSubmit extends Widget also form submit Widget

thank you

Using the form generator you could add an html field and add custom code instead of a submit button.
As for getting the form_id, I guess you could create the form and look at the source code and enter manually.

I could be confused and way off what your asking but would that work for you?

thanks, i am using this solution now but i want something gerneral, because there will be admins who don`t know to implement custom html they only know that a form has to have a submit button :)