var obj=document.getElementById("tableId");

var row=obj.insertRow(obj.rows.length);

var cell0=row.insertCell(0);

cell0.innerHTML="2006-04-09";

var cell1=row.insertCell(1);

cell1.innerHTML="China Holiday";

scrollable table
<div style="overflow:auto;width:200px;height:100px">
<table>
<tr style="position:relative;top:expression(this.offsetParent.scrollTop);background-color:white">
<th>Date</th>
<th>Holiday Type</th>
</tr>
<tr>
<td>2006-10-01</td>
<td>HK Holiday</td>
</tr>
</table>
</div>