// Ecrire dans un cookie
function EcrireCookie(nom, valeur) {
	
	var argv = EcrireCookie.arguments;
	var argc = EcrireCookie.arguments.length;
	var expires = (argc > 2) ? argv[2] : null;
	var path = (argc > 3) ? argv[3] : null;
	var domain = (argc > 4) ? argv[4] : null;
	var secure = (argc > 5) ? argv[5] : false;
	document.cookie = nom + "="+escape(valeur) +
					  ((expires==null) ? "" : ("; expires="+expires.toGMTString()))+
					  ((path==null) ? "" : ("; path="+path)) +
					  ((domain==null) ? "" : ("; domain="+domain)) +
					  ((secure==true) ? "; secure" : "");
}

// Lire dans un cookie
function getCookieVal(offset) {
	
	var endstr = document.cookie.indexOf (";", offset);
	if (endstr == -1)
		endstr = document.cookie.length;
	
	return unescape(document.cookie.substring(offset, endstr));
}

function LireCookie(nom) {
	
	var arg = nom+"=";
	var alen = arg.length;
	var clen = document.cookie.length;
	var i = 0;
	while (i < clen) {
		var j = i + alen;
		if (document.cookie.substring(i, j) == arg)
			return getCookieVal(j);
		i = document.cookie.indexOf(" ",i) + 1;
		if (i == 0)
			break;
	}
	return null;
}

// Efface un cookie
function EffaceCookie(nom) {
	
	date = new Date;
	date.setFullYear(date.getFullYear() - 1);
	EcrireCookie(nom,null,date);
}