function accordion(el) {
    if ($('visible') == el) {
        return;
    }
    if ($('visible')) {
        var eldown = el.parentNode.id+'-body';
        var elup = $('visible').parentNode.id+'-body';
       /* new Effect.Parallel(
        [
			new Effect.BlindUp(elup),
			new Effect.BlindDown(eldown)
        ], {
            duration: 0.5
        });*/
        
		
		$(elup).style.display = 'none';
		new Effect.BlindDown(eldown, {duration: 0.5});
		
		$('visible').id = '';
		
		
    }
    el.id = 'visible';
}

function init() {

    // hide all elements apart from the one with id visible
    var acc = document.getElementById('accordion');
    var apanels = acc.getElementsByTagName('dl');
    for (i = 0; i < apanels.length; i++) {
        if (apanels[i].className == 'panel_body') {
            apanels[i].style.display = 'none';
        }
    }
    var avis = document.getElementById('visible').parentNode.id+'-body';
    document.getElementById(avis).style.display = 'block';
}
function addEvent(elm, evType, fn, useCapture) {
    elm["on"+evType]=fn;return;
}

addLoadEvent(init);