$(document).ready(function(){  

function addMega(){ 
	  $(this).addClass("hovering");
	  } 
function removeMega(){ 
  $(this).removeClass("hovering"); 
  } 
var megaConfig = {
 interval: 250, // Interval avant affichage = 500
 sensitivity: 4,
 over: addMega,
 timeout: 300,
 out: removeMega
};

$("li.mega").hoverIntent(megaConfig);


});