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 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; 
}

function aVote(idPortrait) {
	var date=new Date;
	date.setDate(date.getFullYear()+1);
	EcrireCookie("portrait"+idPortrait, "oui", date, "/", null, false);
}