function accordion(tel) {
var el = document.getElementById(tel);
    if ($('visible') == el) {
	return;
    }
    if ($('visible')) {
        Effect.toggle($('visible'), 'blind', {duration:0.3});
	$('visible').id = $('visible').className;
    }
    Effect.toggle(el, 'blind', {duration:0.3});
    el.className = el.id;
    el.id = 'visible';
}

function init() {

    // hide all elements
    var apanels = document.getElementsByTagName('dd');
    for (i = 0; i < apanels.length; i++) {
        if (apanels[i].className == 'sous_menu') {
		if(apanels[i].id != fixe ) {
	            Effect.toggle(apanels[i], 'blind', {duration:0.5});
        	}
		else {
			apanels[i].className = apanels[i].id;
			apanels[i].id = 'visible';
		}
	}
    }
}

window.onload = init;