Clarify valid chars in event names, close gh-125.

Author: dmethvin

entries/on.xml

@@ -32,7 +32,7 @@
   <longdesc>
     <p>The <code>.on()</code> method attaches event handlers to the currently selected set of elements in the jQuery object. As of jQuery 1.7, the <code>.on()</code> method provides all functionality required for attaching event handlers. For help in converting from older jQuery event methods, see <a href="http://api.jquery.com/bind/"><code>.bind()</code></a>,  <a href="http://api.jquery.com/delegate/"><code>.delegate()</code></a>, and <a href="http://api.jquery.com/live/"><code>.live()</code></a>. To remove events bound with <code>.on()</code>, see <a href="http://api.jquery.com/off/"><code>.off()</code></a>. To attach an event that runs only once and then removes itself, see <a href="http://api.jquery.com/one/"><code>.one()</code></a></p>
     <h2 id="event-names">Event names and namespaces</h2>
-    <p>Any event names can be used for the <code>events</code> argument. jQuery will pass through the browser's standard JavaScript event types, calling the <code>handler</code> function when the browser generates events due to user actions such as <code>click</code>. In addition, the <a href="http://api.jquery.com/trigger/"><code>.trigger()</code></a> method can trigger both standard browser event names and custom event names to call attached handlers.</p>
+    <p>Any event names can be used for the <code>events</code> argument. jQuery will pass through the browser's standard JavaScript event types, calling the <code>handler</code> function when the browser generates events due to user actions such as <code>click</code>. In addition, the <a href="http://api.jquery.com/trigger/"><code>.trigger()</code></a> method can trigger both standard browser event names and custom event names to call attached handlers. Event names should only contain alphanumerics, underscore, and colon chraracters.</p>
     <p>An event name can be qualified by <em>event namespaces</em> that simplify removing or triggering the event. For example, <code>"click.myPlugin.simple"</code> defines both the myPlugin and simple namespaces for this particular click event. A click event handler attached via that string could be removed with <code>.off("click.myPlugin")</code> or <code>.off("click.simple")</code> without disturbing other click handlers attached to the elements. Namespaces are similar to CSS classes in that they are not hierarchical; only one name needs to match. Namespaces beginning with an underscore are reserved for jQuery's use.</p>
     <p>In the second form of <code>.on()</code>, the <code>events</code> argument is a plain object. The keys are strings in the same form as the <code>events</code> argument with space-separated event type names and optional namespaces. The value for each key is a function (or <code>false</code> value) that is used as the <code>handler</code> instead of the final argument to the method. In other respects, the two forms are identical in their behavior as described below.</p>
     <h2 id="direct-and-delegated-events">Direct and delegated events</h2>