This will swap the rows and columns of any size tbody,
as long as rows all have the same number of cells.
<!doctype html>
<html lang= "en">
<head>
<meta charset= "utf-8">
<title> Small Test Page</title>
</head>
<body>
<script>
function tableSwap(){
var t= document.getElementsByTagName('tbody')[0],
r= t.getElementsByTagName('tr'),
cols= r.length, rows= r[0].getElementsByTagName('td').length,
cell, next, tem, i= 0, tbod= document.createElement('tbody');
while(i<rows){
cell= 0;
tem= document.createElement('tr');
while(cell<cols){
next= r[cell++].getElementsByTagName('td')[0];
tem.appendChild(next);
}
tbod.appendChild(tem);
++i;
}
t.parentNode.replaceChild(tbod, t);
}
</script>
<h1> Small Test Page</h1>
<p> <button type= "button" id= "tableSwapBtn" onclick= "tableSwap()">
Swap rows and columns</button> </p>
<table style="width:300px;border:1px" rules="all">
<tbody>
<tr> <td> a</td> <td> 1</td> </tr>
<tr> <td> b</td> <td> 2</td> </tr>
<tr> <td> c</td> <td> 3</td> </tr>
<tr> <td> d</td> <td> 4</td> </tr>
<tr> <td> e</td> <td> 5</td> </tr>
<tr> <td> f</td> <td> 6</td> </tr>
<tr> <td> g</td> <td> 7</td> </tr>
</tbody>
</table>
</body>
</html>
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