Firebug lite javascript events

[Mike Priest]

I am working on a firebug like javascript element selector, but cannot figure out how to stop all JavaScript events from firing when clicked. The firebug lite plugin (https://getfirebug.com/firebuglite) is doing exactly what I want, but cannot figure out what they are doing.
Any help would be appreciated.

Senario:

• User selects element inspector
  
• User clicks on element
• onClick, mousedown, mouseup should NOT fire

I have tried the following with no luck:

function stopEvents(el){

    for(var key in window) {
        if (key.indexOf("on") == 0) {
            el.addEventListener(key.substr(2), stop, false);
        }
    }
}

function StopEvent(pE)
{
    stopEvents(pE);

    if (!pE)
     if (window.event)
       pE = window.event;
     else
       return;
  if (pE.cancelBubble != null)
     pE.cancelBubble = true;
  if (pE.stopPropagation)
     pE.stopPropagation();
  if (pE.preventDefault)
     pE.preventDefault();
  if (window.event)
     pE.returnValue = false;
  if (pE.cancel != null)
     pE.cancel = true;
}

[Sebastian Zartner]

The Firebug inspector doesn't stop all events of an object, it only captures the click event. If that's enough for you, you can simply do that by setting the third parameter of addEventListener() to true instead of false to trigger at the capturing phase of the event and then cancel the event.

Sebastian