.x-grid3-hd-row-expander{width:100%;height:13px;background-position:0 0;background-repeat:no-repeat;background-color:transparent;background-image:url(../../resources/images/default/grid/row-expand-sprite.gif);}
 .x-grid3-hd-collapsed .x-grid3-hd-row-expander{background-position:0 0 !important;}
 .x-grid3-hd-expanded .x-grid3-hd-row-expander{background-position:-25px 0!important;}