.cke_button__addfile_icon{
    background:url("addfileicon.png") no-repeat left top !important;
    background-size: 16px 16px !important;
}
.cke_button__valignbottom_icon{
    background:url("valignbottom.png") no-repeat left top !important;
    background-size: 16px 16px !important;
}
.cke_button__valigncenter_icon{
    background:url("valigncenter.png") no-repeat left top !important;
    background-size: 16px 16px !important;
}
.cke_button__valigntop_icon{
    background:url("valigntop.png") no-repeat left top !important;
    background-size: 16px 16px !important;
}
.cke_button__valigndefault_icon{
    background:url("valigndefault.png") no-repeat left top !important;
    background-size: 16px 16px !important;
}