openMenuSociete = function(){
	objDiv = document.getElementById('presentation_menu');
	objDiv.style.display='block';
}

closeMenuSociete = function(){
	objDiv = document.getElementById('presentation_menu');
	objDiv.style.display='none';
}

jQuery(document).ready(function() {
	jQuery('#presentation_menu').mouseleave(function(){
		closeMenuSociete();
	});
});