.gwt-SplitLayoutPanel-HDragger {
  background: #e7e7e7 url(images/thumb_vertical.png) center center no-repeat;
  cursor: col-resize;
}
.gwt-SplitLayoutPanel-VDragger {
  background: #e7e7e7 url(images/thumb_horz.png) center center no-repeat;
  cursor: row-resize;
}