Sort by table content

How can you sort any HTML table using jQuery?

Element 40	✔
Element 2	✔
Element 29	✔
Element 28	✔
Element 5	✔

Suppose you only want to use the number.

1. First we must sort elements
2. After that we have to keep going deleting each element and appending again to the table with the new order

// JS
$("table tr").sort(function (a, b) {
    var a_num = $(a).children(":first-child").text().split(" ")[1];
    var b_num = $(b).children(":first-child").text().split(" ")[1];
    return parseInt(a_num) - parseInt(b_num);
}).each(function(){
    var elem = $(this);
    elem.remove();
    $(elem).appendTo("table > tbody");
});

See a real example:

Edited: improved and without jQuery.