Question

Possible Duplicate:
How to do insert After() in JavaScript without using a library?

Currently this script adds a row at the bottom of the table. How do I tell it to add it after a particular row? At the top of the table?

<script>
var i = 1;

function changeIt() {
var tr = document.createElement('tr');
var td = tr.appendChild(document.createElement('td'));
td.style.valign = 'middle';

var span = td.appendChild(document.createElement('span'));
span.style.fontWeight = 'bold';
span.appendChild(document.createTextNode('URL ' + i));

td = tr.appendChild(document.createElement('td'));
var input = td.appendChild(document.createElement('input'));
input.name = 'url' + ++i;
input.type = 'text';
input.size = '40'

document.getElementById('myTable').tBodies[0].appendChild(tr);

}
</script>

I’ve been searching Google to learn, but I keep coming across jQuery, innerhtml, and insertrow answers.

Answer 1

You’re looking for node.insertBefore() https://developer.mozilla.org/en-US/docs/DOM/Node.insertBefore

var i = 1;

function changeIt() {
    var tr = document.createElement('tr');
    var td = tr.appendChild(document.createElement('td'));
    td.style.valign = 'middle';

    var span = td.appendChild(document.createElement('span'));
    span.style.fontWeight = 'bold';
    span.appendChild(document.createTextNode('URL ' + i));

    td = tr.appendChild(document.createElement('td'));
    var input = td.appendChild(document.createElement('input'));
    input.name = 'url' + ++i;
    input.type = 'text';
    input.size = '40'
    var node = document.getElementById('myTable').tBodies[0];
    node.insertBefore(tr, node.firstChild);

}

To add to a specific position you will need to know the index in the .children. Otherwise some key identifier (class name, attribute, or ID), something you can pass into a getBy or QSA.