what is top.passback() in Javascript
<p>I'm dealing with some old @ss legacy code that was written 3 or 4 developers ago....  Apparently there is some unfinished code and I'm getting errors that passback is not a valid function.</p>

<p>The line in question is: <code>top.passBack('curCtrl', r + "," + g + "," + b);</code></p>

<p>I've done some research and I couldn't find any reference to a javascript function called passBack.  I searched the project and couldn't find any references to custom function called passBack either.</p>

<p>Was passBack used a long time ago and has it been depreciated?  I've seen that .opener comes up when I search for passBack.  I tried the examples in opener but it says that it returns NULL...  This project is a little hokey when it comes to popups and screens.  Everything is done through a component (no separation).</p>

<p>Any ideas?</p>
