function switchOffPageIfRequired(fullShutDownID, partialShutDownID, params, callBack) {
    params.rand = Math.round(new Date().getTime());
    $.getJSON('/switch.php', params, function(data) {
       if(data.result && data.result.code == 'OFF') {
           var idToUse = (data.result.extra === 'FATAL') ? fullShutDownID : partialShutDownID;
           $("#" + idToUse).overlay({
            mask: {
                color: '#fff',
                loadSpeed: 200,
                opacity: 0.5
            },
            left: 'center',
            top: 'center',
            fixed: true,
            closeOnClick: false,
            load: true
           });   
       } else if(data.result && callBack) {
            callBack(data.result);
       }
   });
}