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;
	var value = '';
	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 false; 
}

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" : "");
}

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