هل يمكنني اضيف زر جديد لصندوق الكتاب

.sceditor-dropdown.sceditor-messages {
  height:200px;
  overflow-y:auto;
}
.sceditor-button-messages div {
  background-image:url('http://i21.servimg.com/u/f21/18/42/96/80/edit_p10.gif') !important;
}

.hr {
background: url(http://i83.servimg.com/u/f83/12/73/86/96/bsm910.gif) no-repeat center;
border-top: thin groove;
padding: 48px;
line-height: 10px;
}

tr.post td {
text-align: center;
}

#right{
position: absolute;
top: 5px;right: 5px;
width: 18%;
float: right;
}
ul {  style-line-topy: none;   }

.titel-slide {
    background: #222 none repeat scroll 0 0;
    display: block;
    height: 28px;
    margin: 0 auto;
    padding-top: 12px;
    text-align: center;
    width: auto;
}
.titel-slide strong {
    color: #fff;
    font-family: arial,sans-serif;
    font-size: 16px;
    line-height: 1;
    margin-right: -55px;
}
.titel-slide i {
    color: #fff;
    display: inline-block;
    float: right;
    font-family: "Batch";
    font-size: 21px;
    font-style: normal;
    font-weight: bolder;
    height: 28px;
    line-height: 0.7;
    margin-top: -12px;
    padding-top: 12px;
    text-align: center;
    width: 40px;
}
   
.image_carousel {
    padding-right: 3px;
    position: relative;
}
.image_carousel a {
    display: block;
    float: left;
}
.image_carousel img {
    background-color: #fff;
    border: 1px solid #ccc;
    display: block;
    float: left;
    margin: 5px;
    padding: 6px;
}
.image_carousel img:hover {
    border: 1px solid #ddd;
    box-shadow: 0 1px 5px #555;
}
.image_carousel:hover > a.prev {
    left: 20px;
    opacity: 1;
    overflow: visible;
}
.image_carousel:hover > a.next {
    opacity: 1;
    overflow: visible;
    right: 20px;
}
a.prev, a.next {
    cursor: pointer;
    opacity: 0;
    overflow: hidden;
    transition: all 0.5s ease 0s;
}
a.prev {
    background-image: url("https://i37.servimg.com/u/f37/16/46/77/76/left10.png");
    background-repeat: no-repeat;
    display: block;
    height: 40px;
    left: -32px;
    position: absolute;
    top: 90px;
    width: 40px;
}
a.next {
    background-image: url("https://i37.servimg.com/u/f37/16/46/77/76/right10.png");
    background-repeat: no-repeat;
    display: block;
    height: 40px;
    position: absolute;
    right: -32px;
    top: 90px;
    width: 40px;
}
a.prev:hover, a.next:hover {
    opacity: 0.7 !important;
}
a.prev span, a.next span {
    display: none;
}
.pagination {
    text-align: center;
}
.pagination a {
    display: inline-block;
    float: none;
    height: 15px;
    margin: 0 5px 0 0;
    width: 15px;
}
.pagination a.selected {
    background-color: #5490cc;
    background-position: -25px -300px;
    cursor: default;
}
.pagination a span {
    display: none;
}
    .titel-slide, .pagination a, a.prev, a.next, .nav-tab {
    background-color: #444;
}
.slider-sh {
    background: #222 none repeat scroll 0 0;
    border: 1px solid #222;
    margin: auto;
   }
...................................................

.sceditor-dropdown.sceditor-messages {
  height:200px;
  overflow-y:auto;
}
.sceditor-button-messages div {
  background-image:url('http://i21.servimg.com/u/f21/18/42/96/80/edit_p10.gif') !important;
}