Mootools build form

So I am trying to make a custom in place editor in mootools and I want to use a form. Whenever I do try to create a form it just creates <form class="inplaceeditor-form" method="post" action="#"/> How can I make it a form where I can inject other elements?

From stackoverflow

• You have to create the other input elements to go inside the form. Something like this:

     // create the form element
     var form = new Element('form', {'action' : 'your/action', 'class' : 'inplaceeditor-form'});
    //create the textbox
     var textarea = new Element('textarea', {'name' : 'myTextarea'});
      //create the submit button  
   var button = new Element('input', {'type' : 'submit', 'value' : 'Submit Me!'});
     // this puts the textarea and the button into the form
     form.adopt(textarea,button);
     // put the form inside what ever container you user
      $('myContainer').adopt(form);
  
     // the code above should give you this
     <div id="myContainer">
         <form action="your/action" method="post" class="inplaceeditor-form">
              <textarea name="myTextarea"></textarea>
              <input type="submit" value="Submit Me!" />
        </form>