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    <p>A class is made up of properties and functions: usually a constructor, which runs as soon as the class is instantiated (which in document classes is as soon as the application runs), and then other functions which are called in different ways.</p> <p>What you've done is that you've put all your functions <em>within</em> the constructor: not good. That's putting a function in a function, you just don't do that (although technically, you could make anonymous functions, but that's a different story).</p> <p>In addition, your event listeners should be added within the constructor. Adding event listeners is calling a function, and (to my knowledge) you can't call functions from a class outside of other functions.</p> <p>Basically, you should just take your functions out of the constructor, like this:</p> <pre><code>package{ import flash.display.MovieClip; import flash.events.MouseEvent; import flash.text.TextField; public class button extends MovieClip{ public function button() { home_btn.addEventListener(MouseEvent.CLICK, goHome); about_btn.addEventListener(MouseEvent.CLICK, goAbout); links_btn.addEventListener(MouseEvent.CLICK, goLinks); contact_btn.addEventListener(MouseEvent.CLICK, goContact); } function goHome (e:MouseEvent):void{ gotoAndStop("Home"); } function goAbout (e:MouseEvent):void{ gotoAndStop("About"); } function goLinks (e:MouseEvent):void{ gotoAndStop("Links"); } function goContact (e:MouseEvent):void{ gotoAndStop("Contact"); } } } </code></pre> <p>Another thing is that the file name should be identical to the class name. That is, your document class should be called <code>button.as</code> instead of <code>site1.as</code>. I'm not completely sure if it's 100% necessary in the Flash IDE (been a while since I've used it) since it didn't give an error, but even if it isn't it's good practice.</p> <p>It'd be a good idea to study up on how classes work, and document classes specifically. <a href="http://www.kirupa.com/developer/as3/classes_as3_pg1.htm" rel="nofollow">Here's a kirupa tutorial on classes</a>, and <a href="http://active.tutsplus.com/tutorials/actionscript/quick-tip-how-to-use-a-document-class-in-flash/" rel="nofollow">here's an ActiveTuts+ tutorial on document classes</a>.</p>
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    1. POHow do I control a movieclip using a button?
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    1. COI just now rectified my code as I forgot to add the event listeners to the constructor. However Eric's answer has a point about specifying the scope of functions with `private`/`public` accessors: while they aren't essentially, it's generally good practice to specify them for clarity, if nothing else.
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