function ckCookieRecuperaValor( name ) {
var ckObj = document.cookie;
var index = ckObj.indexOf( name + "=" );
if (index == -1) return null;
else{
	index = ckObj.indexOf( "=", index ) + 1;
    var finStr = ckObj.indexOf( ";", index );
    if (finStr == -1) finStr = ckObj.length;
    return unescape( ckObj.substring(index, finStr) );
	}
}