How to scroll table's “tbody” independent of “thead”?

As specified here:

Table rows may be grouped into a table head, table foot, and one or more table body sections, using the THEAD, TFOOT and TBODY elements, respectively. This division enables user agents to support scrolling of table bodies independently of the table head and foot.

I created the following example, but it doesn't work.




$(function() {
    for (var i = 0; i < 20; i++) {
        var a = Math.floor(10 * Math.random());
        var b = Math.floor(10 * Math.random());
        var row = $("<tr>").append($("<td>").html(a + " + " + b + " ="))
                           .append($("<td>").html(a + b));


table {
    background-color: #aaa;
tbody {
    background-color: #ddd;
    height: 100px;
    overflow: auto;
td {
    padding: 3px 10px;


The missing part is:

thead, tbody {
    display: block;


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