JavaScript simulate right click through code

Here is a more correct version if you do not care about where the context menu gets fired up

function fireContextMenu(el) {
  var evt = el.ownerDocument.createEvent("HTMLEvents")
  evt.initEvent('contextmenu', true, true) // bubbles = true, cancelable = true

  if (document.createEventObject) {
    return el.fireEvent('oncontextmenu', evt)
  }
  else {
    return !el.dispatchEvent(evt)
  }
}

If you do, we may have to use the previous one, fix up it's behaviour in IE, and populate the screenX, screenY, clientX, clientY etc appropriately

Just for good measure, here is a bit of doco on the parameters:

var myEvt = document.createEvent('MouseEvents');
myEvt.initMouseEvent(
   'click'          // event type
   ,true           // can bubble?
   ,true           // cancelable?
   ,window      // the event's abstract view (should always be window)
   ,1              // mouse click count (or event "detail")
   ,100           // event's screen x coordinate
   ,200           // event's screen y coordinate
   ,100           // event's client x coordinate
   ,200           // event's client y coordinate
   ,false         // whether or not CTRL was pressed during event
   ,false         // whether or not ALT was pressed during event
   ,false         // whether or not SHIFT was pressed during event
   ,false         // whether or not the meta key was pressed during event
   ,1             // indicates which button (if any) caused the mouse event (1 = primary button)
   ,null          // relatedTarget (only applicable for mouseover/mouseout events)
); 

Great question!

I did some research, and it seems like you can fire a mouse event like is shown here, and make it a right-click by setting the button or which property to 2 (documented here).

Perhaps this code will work:

function rightClick(element){
  var evt = element.ownerDocument.createEvent('MouseEvents');

  var RIGHT_CLICK_BUTTON_CODE = 2; // the same for FF and IE

  evt.initMouseEvent('click', true, true,
      element.ownerDocument.defaultView, 1, 0, 0, 0, 0, false,
      false, false, false, RIGHT_CLICK_BUTTON_CODE, null);

  if (document.createEventObject){
    // dispatch for IE
    return element.fireEvent('onclick', evt)
  }
  else{
    // dispatch for firefox + others
    return !element.dispatchEvent(evt);
  }
}

try this instead, reason what things didn't quite work is that the context menu is in fact bound to the oncontextmenu event.

function contextMenuClick(element){
    var evt = element.ownerDocument.createEvent('MouseEvents');

    var RIGHT_CLICK_BUTTON_CODE = 2; // the same for FF and IE

    evt.initMouseEvent('contextmenu', true, true,
         element.ownerDocument.defaultView, 1, 0, 0, 0, 0, false,
         false, false, false, RIGHT_CLICK_BUTTON_CODE, null);

    if (document.createEventObject){
        // dispatch for IE
       return element.fireEvent('onclick', evt)
     }
    else{
       // dispatch for firefox + others
      return !element.dispatchEvent(evt);
    }
}