this code :
<asp:WebPartManager ID="myWPM" runat="server"> </asp:WebPartManager>
 automatically generates JavaScript code at the bottom of the page:

<script type="text/javascript">   __wpm = new WebPartManager(); __wpm.overlayContainerElement = document.getElementById('MainContent_myWPM___Drag'); __wpm.personalizationScopeShared = false;   var zoneElement; var zoneObject;   zoneElement = document.getElementById('MainContent_leftArea') Go to the complete details ...