var slogan = document.getElementById('slogan'); /* <div id="slogan"> */
var slogansLiens = slogan.getElementsByTagName('a');
var sloganCourant = -1;
var slogansTimer = null;
var slogansContenus = new Array(slogansLiens.length);

for (var i = 0; i < slogansContenus.length; i++) {
	slogansContenus[i] = new Array();
	slogansContenus[i][0] = slogansLiens[i].href;
	slogansContenus[i][1] = slogansLiens[i].innerHTML;
}

function changerSlogan() {
	sloganCourant = (sloganCourant+1) % slogansContenus.length;
	slogan.innerHTML = '<a href="'+slogansContenus[sloganCourant][0]+'">' +
		slogansContenus[sloganCourant][1] +
	'</a>';
}

slogan.style.paddingTop = '50px';
changerSlogan();
slogansTimer = window.setInterval('changerSlogan()', 4000);