Javascript/JQuery event arguments. I don't understand what this 'e' argument is or does
<p>JQuery:</p>

<pre><code>this.saveButton.click(function (e) {
    scope.saveForm();
});
</code></pre>

<p>This is a very simple line of JQuery that binds the .click() event to the saveButton object and calls a saveForm function when the event is fired.</p>

<p>When this event is called, what is 'e'?  I don't think it is ever used.</p>
