ExtJs 4 ButtonGroup: add Office 2010 effect to selection

To add Office 2010 effect on icon selection; color background when you press an icon, add the following code to your CSS file:

    
.x-btn-default-toolbar-large-menu-active, .x-btn-default-toolbar-large-pressed
{
 /*original : background-image: -moz-linear-gradient(top, #bccfe5,#c5d6e7 48%,#95c4f4 52%,#9fc9f5);*/    
    background-image: -moz-linear-gradient(center top , #FFFAE1, #FFD66A 48%, #FCB743  52%, #FFF8B5);
    background-image: -webkit-gradient(linear, 50% 0%, 50% 100%, color-stop(0%, #FFFAE1), color-stop(48%, #FFD66A), color-stop(52%, #FCB743), color-stop(100%, #FFF8B5));
   background-image: linear-gradient(top, #FFFAE1,#FFD66A 48%,#FCB743 52%,#FFF8B5);
    border-color: #F9AE52;
}