// cookies
function setCookie(nom, valeur) {
	var argv = setCookie.arguments;
	var argc = setCookie.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 getCookieVal(offset) {
	var endstr=document.cookie.indexOf (";", offset);
	if (endstr == -1) {
		endstr = document.cookie.length;
	}
	return unescape(document.cookie.substring(offset, endstr));
}

function getCookie(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;
}

function unsetCookie(nom) {
	var date = new Date;
	date.setFullYear(date.getFullYear()-1);
	setCookie(nom, null, date);
}