.chw-ajax-response-list {
    display: none;
}

.chw-ajax-modal {
    display:    none;
    position:   fixed;
    z-index:    5000;
    top:        0;
    left:       0;
    height:     100%;
    width:      100%;
    background: rgba( 255, 255, 255, .5 ) 
                url('chw-ajax__pending.gif') 
                50% 50% 
                no-repeat;
}

.chw-ajax-modal.chw-ajax-modal_pending {
    display: block;
}