I tried to detect which mouse button -if any- is the user pressing during a mousemove event under jQuery, but I'm getting ambiguous results:

no button pressed:      e.which = 1   e.button = 0
left button pressed:    e.which = 1   e.button = 0
middle button pressed:  e.which = 2   e.button = 1
right button pressed:   e.which = 3   e.button = 2

Code:

<!DOCTYPE html>
<html>
<head>
  <script src="http://code.jquery.com/jquery-latest.min.js"></script>
</head>
<body>

<input id="whichkey" value="type something">
<div id="log"></div>
<script>$('#whichkey').bind('mousemove',function(e){ 
  $('#log').html(e.which + ' : ' +  e.button );
});  </script>

</body>
</html>

How can I tell the difference between left mouse button pressed and no button at all?

jquery
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