function SwitchPanel(p_cat) {

	// switcher les panels
	var elements = getElementsByClassName('sel_categorie_sublist', 'div', $get('selecteur_categories'));
	for (var i=0; i<elements.length; i++) {
		if (elements[i].id == 'sel_categorie_' + p_cat + '_sublist')
			elements[i].style.display = elements[i].style.display == 'none' ? '' : 'none';
		else
			$undisplay(elements[i]);	
	}
	
	// mémoriser le panel ouvert
	EdLib.makeHTTPRequest("GET", "/ws/memorise_categorie_panel.php", function() {}, { "cat_id" :  p_cat });
}