Catch only keypresses that change input?
<p>I want to do something when a keypress changes the input of a textbox. I figure the <code>keypress</code> event would be best for this, but how do I know if it caused a change? I need to filter out things like pressing the arrow keys, or modifiers... I don't think hardcoding all the values is the best approach.</p>

<p>So how should I do it?</p>
