css控制tbody滚动,thead固定

<style>

table{

border-collapse:collapse;

}

table tbody{

  display:block;

  height:195px;

  overflow-y:scroll;

}

table thead, tbody tr{

  display:table;

  width:100%;

  table-layout:fixed;

}

table thead{  width:calc(100% -1em ) }   //对齐

table thead th{

  background:#ccc;

}

</style>

border-collapse: collapse;

}