function initApercu() {
	switchAll();
    var apercus = getElementsByClass('apercu_annonce');

	if(apercus.length > 0) {
	    for (var j=0; j < apercus.length; j++) {
	        addEvent(apercus[j], 'click', switchApercu);
	        apercus[j].style.cursor = 'pointer';
	    }
		addEvent($('hidden'), 'click', switchAll);
	}
}
function switchApercu(e) {
    var evt = getStandardEvent(e);
    var dest = $('apercu');
    var legend = $('legend');
    dest.innerHTML = '<img src="'+evt.target.src+'" width="400" />';
    if(evt.target.alt != '')
		legend.innerHTML = evt.target.alt;
	else
		legend.innerHTML = '&nbsp;';
    evt.preventDefault();
    return false;
}
function switchAll() {
	var dest = $('apercu');
    var legend = $('legend');
	if(dest && legend) {
		dest.innerHTML = '';
		legend.innerHTML = '&nbsp;';
	}

    return false;
}
addEvent(window, 'load', initApercu);