.z-window-modal .z-window-close, .z-window-highlighted .z-window-close, .z-window-move-ghost .z-window-close,
.z-window-modal .z-window-close:hover, .z-window-highlighted .z-window-close:hover,
.z-window-move-ghost .z-window-close:hover {
    background-repeat: no-repeat;
    background-position-x: 0px;
    background-position-y: center;
}