/**
   * Insert a new line in the multi line text.
   * @param HTMLButtonObject buttonObject
   */
  function addMultitextLine(buttonObject) {
	var buttonObject = new Element(buttonObject);
	
	// create new dd element
	var myDd = new Element('dd');
	var myInput = new Element('input', {
	  type: 'text',
	  name: buttonObject.get('id') + '[]'
	});
	myInput.inject(myDd);
		
	// append new dd element
	ddEl = buttonObject.getParent();
	myDd.inject(ddEl, 'before');
  }