/*corrigé grâce à http://www.quirksmode.org/js/cookies.html*/
function setCookie(name, value, days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = 	name + "=" + escape(value) +
						expires +
						"; path=/";
}

function deleteCookie(name) {
	if( getCookie(name) ) {
		document.cookie = 	name + "=" +
							";path=/" + 
							"; expires=Thu, 24-Jun-77 00:00:01 GMT";
	}
}

function getCookie(name) {
	var dc = document.cookie;
	var prefix = name + "=";
	var begin = dc.indexOf("; " + prefix);
	if (begin == -1) {
		begin = dc.indexOf(prefix);
		if (begin != 0) return null;
	} else begin += 2;
	var end = document.cookie.indexOf(";", begin);
	if (end == -1) end = dc.length;
	return unescape(dc.substring(begin + prefix.length, end));
}