bootstrap table表格外面的边框全部去掉

.fixed-table-container {
    position: relative;
    clear: both;
    /*border: 1px solid #ddd;*/
    border-radius: 4px;
    -webkit-border-radius: 4px;
    -moz-border-radius: 4px
}

#mytab thead tr th {
    border: 0;
}