ตาราง createTFoot() Method

// Find a <table> element with id="myTable":
var table = document.getElementById("myTable");

// Create an empty <tfoot> element and add it to the table:
var footer = table.createTFoot();

// Create an empty <tr> element and add it to the first position of <tfoot> :
var row = footer.insertRow(0);     

// Insert a new cell (<td>) at the first position of the "new" <tr> element:
var cell = row.insertCell(0);

// Add some bold text in the new cell:
cell.innerHTML = "<b>This is a table footer</b>";

function myCreateFunction() {
    var table = document.getElementById("myTable");
    var footer = table.createTFoot();
    var row = footer.insertRow(0);
    var cell = row.insertCell(0);
    cell.innerHTML = "<b>This is a table footer</b>";
}

function myDeleteFunction() {
    document.getElementById("myTable").deleteTFoot();
}