function setCook2(nom,valeur,jours) {
        var expDate = new Date()
        expDate.setTime(expDate.getTime() + (jours * 24 * 3600 * 1000))
        document.cookie = nom + "=" + escape(valeur)
            + ";expires=" + expDate.toGMTString()
        }

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;
}