body {

}

.splitter-box {
    box-sizing: border-box;
    /*background-color: #f5f5f5;*/
    position: absolute;
    left: 0;
    right: 0;
    top: 50px;
    bottom: 0;
    overflow-y: auto;
    overflow-x: hidden;
}

.splitter-left {
    position: fixed;
    z-index: 15;
    bottom: 0;
    width: 100%;
    background-color: #f9f9f9;
    float: left;
}

.splitter-right {
    position: fixed;
    z-index: 10;
    bottom: 0;
    right: 0;
    left: 303px;
    float: right;
    top: 50px;
    /*background-color: #fff;*/
    overflow-y: auto;
}