#summary_messages {
    text-align: center;
    font-style:italic;
}

.tableFixHead
{
    overflow-y: auto;
    height: 500px;
}
.tableFixHead > table
{
    border-collapse: collapse;
    width: 100%;
}
.tableFixHead > table > thead > tr > th
{
    position: sticky;
    top: 0;
    z-index:5;
    background:#ffffff;
}
.tableFixHead > table > tbody > tr > td:first-child
{
    position: sticky;
    left: 0;
    background-color: #ffffff;
    z-index: 4;
}