How to detect a textbox's content has changed

Question

I want to detect whenever a textbox\'s content has changed. I can use the keyup method, but that will also detect keystrokes which do not generate letters, like the arrow ke

Answer 1

Use the onchange event in HTML/standard JavaScript.

In jQuery that is the change() event. For example:

$('element').change(function() { // do something } );

EDIT

After reading some comments, what about:

$(function() {
    var content = $('#myContent').val();

    $('#myContent').keyup(function() { 
        if ($('#myContent').val() != content) {
            content = $('#myContent').val();
            alert('Content has been changed');
        }
    });
});