title: Modal window not being invoked by onClick button event
body: <p>Here's my problem:</p>
  
  <p>I am creating a simple content management system written in PHP/MySQL.  I have each page written with some php and html elements, therefore using a .php extension.  The page I'm having issues with is the "create a new article" page - basically, I need an html form button to invoke ModalBox allowing the user to select an image to insert into a text area.  I am also using, in this same form, The Tiny MCE rich text editor tools for the text area.</p>
  
  <p>My includes at the top look like this:</p>
  
  <pre><code>&lt;script language="JavaScript" type="text/javascript" src="js/prototype.js"&gt;&lt;/script&gt;
  &lt;script language="javascript" type="text/javascript" src="js/scriptaculous.js?load=builder,effects"&gt;&lt;/script&gt;
  &lt;script language="javascript" type="text/javascript" src="js/modalbox.js"&gt;&lt;/script&gt;
  
  &lt;link rel="stylesheet" href="modalbox.css" type="text/css" media="screen" /&gt;
  
  &lt;script language="JavaScript" src="js/tiny_mce.js" type="text/javascript"&gt;&lt;/script&gt;
  </code></pre>
  
  <p>This is what my button/ModalBox call looks like:</p>
  
  <pre><code>&lt;input type="button" name="insert_image" id="insert_image" value="Insert an Image" onclick="this.blur(); Modalbox.show('image_select.htm', {width: 600, title: 'Select an Image'}); return false;" /&gt;
  </code></pre>
  
  <p>I've tried numerous things to get it to work, but nothing seems to make a difference - Any ideas?  Thanks!</p>