$(document).ready(function() {

	/*
	 * Rotation de header jQuery :
	 */
	var nbHeader = 4;
	var round = parseInt( (Math.random() * (nbHeader) ) + 1 );
	$('div#top div.logo').addClass('logo'+round);
	$('div#top div.main-logo').addClass('main-logo'+round);
});



function questionReponse (id) {
	if(document.getElementById(id).style.display == 'none') {
		document.getElementById(id).style.display = 'block';
	} else {
		document.getElementById(id).style.display = 'none'
	}
}