.RadAjax_Src .raDiv {
  background-image: url('Common/loading.gif');
}

.RadAjax_Src .raColor {
    color: #333333;
    border-radius: 4px;
    background-color: rgba(107,117,137,0.5);
    -pie-background:  rgba(107,117,137,0.5);
    behavior: url(PIE.htc);
}