HTML
<html>
<head>
<title>Hello World!</title>
</head>
<body>
<table id = "t1" border = 1>
<caption>Dersler</caption>
<th>Saatler</th>
<th>Pazartesi</th>
<th>Salı</th>
<th>Çarşamba</th>
<th>Perşembe</th>
<th>Cuma</th>
</table>
<script>
var tab1 = document.getElementById("t1");
var trow = tab1.insertRow(tab1.rows.length);
var tcell = trow.insertCell(0);
var tr2 = tab1.insertRow(tab1.rows.length);
var tcelll = tr2.insertCell(0);
tcell.innerHTML = "2";
tcelll.innerHTML = "1";
tab1.appendChild(trow);
trow.appendChild(tcell);
tr2.appendChild(tcelll);
</script>
</body>
</html>