.scrolltable {
  position: relative;
}

.scrolltable .scrolltable-header {
    height: 2em;
}

.scrolltable .scrolltable-div {
    overflow-x: hidden;
    overflow-y: auto;
}

.scrolltable th {
    padding-top: 0;
    padding-bottom: 0;
    margin-top: 0;
    margin-bottom: 0;
}

.scrolltable th div {
    height: 2em;
    position: absolute;
    top: 0;
}