documented how to disable the hidePlaceholderMenuItems option in selectmenus

Author: scottjehl

docs/forms/forms-selects.html

@@ -133,7 +133,12 @@ <h2>Placeholder options</h2>
 		<li>An option with a <code>data-placeholder="true"</code> attribute. (This allows you to use an option that has a value and a textnode as a placeholder option).</li>
 	</ul>
 
-	
+	<p>You can disable this feature through the selectmenu plugin's <code>hidePlaceholderMenuItems</code> option, like this:</p>
+	<pre>
+	<code>
+$.mobile.selectmenu.prototype.options.hidePlaceholderMenuItems = false;		
+	</code>
+	</pre>
 
 
 	<p>Here's a demo of various placeholder options:</p>