Get all events handlers attached to an element

I need to find all events handlers attached to #mySelect and if the event is created via jQuery I can get it , here alert(e) will show only "change" without "click"

JavaScript :

$("#mySelect").change(function(){
    alert("changed");
})           
$.each($._data(  $("#mySelect")[0], "events" ), function(e) {
    alert(e);
})

Html :

<select id="mySelect" onclick="alert('hello')" >
    <option value="1">option 1</option>
    <option value="2">option 2</option>
    <option value="3">option 3</option>
    <option value="4">option 4</option>
</select>