Add ONCLICK to Flash Button

I hate to be such a dunce - I've read the responses to others that have had this problem, but I still can't get it to work. I want to add an onclick event to a Flash button provided by Dreamweaver. Here is the code:
      <script type="text/javascript">
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=5,0,0,0','width','105','height','33','title','Add to Cart','src','addCart','quality','high','pluginspage','http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash','movie','addCart'); //end AC code
      </script>
      <noscript>
      <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=5,0,0,0" width="105" height="33" title="Add to Cart">
        <param name="BGCOLOR" value="" />
        <param name="movie" value="addCart.swf" />
        <param name="quality" value="high" />
        <embed src="addCart.swf" quality="high" pluginspage="http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash" type="application/x-shockwave-flash" width="105" height="33" ></embed>
      </object>
      </noscript>
Where does the Onrelease and GetURL code go? Can I also include return false;?Start Free Trial