// Popup centré
function centerPopup(page,largeur,hauteur,options) {
	var top=(screen.height-hauteur)/2;
	var left=(screen.width-largeur)/2;
	window.open(page,"","top="+top+",left="+left+",width="+largeur+",height="+hauteur+","+options);
}

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 (name) {
        var arg=name+"=";
        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;
}