Add the buttons which allow the suer to craete a new object Or reference an exiting one with a URI.
function WildCardButtons () {
      var menuDiv = myDocument.getElementById(outline.UserInput.menuID)
      var div = menuDiv.insertBefore(myDocument.createElement('div'), menuDiv.firstChild)
      var input1 = div.appendChild(myDocument.createElement('input'))
      var input2 = div.appendChild(myDocument.createElement('input'))
      input1.type = 'button'; input1.value = 'New...'
      input2.type = 'button'; input2.value = 'Know its URI'

      function highlightInput (e) { // same as the one in newMenu()
        var menu = myDocument.getElementById(outline.UserInput.menuID)
        if (menu.lastHighlight) menu.lastHighlight.className = ''
        menu.lastHighlight = UI.utils.ancestor(UI.utils.getTarget(e), 'INPUT')
        if (!menu.lastHighlight) return // mouseover <TABLE>
        menu.lastHighlight.className = 'activeItem'
      }
      div.addEventListener('mouseover', highlightInput, false)
      input1.addEventListener('click', this.createNew, false)
      input2.addEventListener('click', this.inputURI, false)
    }