// Ecriture d'un cookie
function  setCookie( sName, sValue, nDays ) {
					var expires = "";
					if ( nDays ) {
							var d = new Date();
							d.setTime( d.getTime() + nDays * 24 * 60 * 60 * 1000 );
							expires = "; expires=" + d.toGMTString();
					}
					document.cookie = sName + "=" + sValue + expires + "; path=/";
}
// Lecture d'un cookie
function  getCookie(sName) {
					var re = new RegExp( "(\;|^)[^;]*(" + sName + ")\=([^;]*)(;|$)" );
					var res = re.exec( document.cookie );
					return res != null ? res[3] : null;
}
// Suppression d'un cookie
function  removeCookie( name ) {
					setCookie( name, "", -1 );
}