用addEventListener():

var myDiv = document.getElementById('myDiv'); 
myDiv.addEventListener('click', OnMyDivClicked, false); // false = bubbling phase, true = capture phase 

function OnMyDivClicked(event) 
{ 
  switch(event.eventPhase) 
  { 
    case Event.CAPTURING_PHASE: 
      alert('capturing phase'); 
      break; 

    case Event.AT_TARGET: 
      alert('at target'); 
      break; 

    case Event.BUBBLING_PHASE: 
      alert('bubbling phase'); 
      break; 
  } 
}