Tryit Editor v2.9

Edit This Code:
<!DOCTYPE html>
<html>
<head>
<style>
table, td {
    border: 1px solid black;
}
</style>
</head>
<body>

<p>Click the button to return the innerHTML of the tfoot element.</p>

<table id="myTable">
   <thead>
     <tr>
       <th>Month</th>
       <th>Savings</th>
     </tr>
   </thead>
   <tfoot>
     <tr>
       <td>Sum</td>
       <td>$180</td>
     </tr>
   </tfoot>
   <tbody>
     <tr>
       <td>January</td>
       <td>$100</td>
     </tr>
     <tr>
       <td>February</td>
       <td>$80</td>
     </tr>
   </tbody>
</table><br>

<button onclick="myFunction()">Try it</button>

<script>
function myFunction() {
    alert(document.getElementById("myTable").tFoot.innerHTML);
}
</script>

</body>
</html>