iPad - Phonegap project - Memory issue

I am developping an HTML5 version of an old project.
The application is like a slideshow of slides, which contains panoramas.
I am using Phonegap 2.2.0 to package the app on iPad 2.
The slideshow engine is deck.js

Actually, at each slide containing a panorama, i created in JS a new panorama viewer using this sample code:

var viewer = createPanoViewer({swf: 'javascript/libs/krpano/pano.swf', target: settings.target, width: settings.width, height: settings.height});
viewer.addVariable('xml', data.xml);
viewer.addParam('wmode', settings.wmode);
viewer.addVariable('startscene', settings.startscene);
viewer.useHTML5(settings.useHTML5);
viewer.embed();

There can have slide with just text & image between two panoramas.

Trying multiple times the app on my iPad, the app crash after watching 3 or 5 panoramas.

I have tried to completely destroy JS reference with this code:

viewer = null;
destroy viewer;

But the problem doesn't go away.

So, Klaus, did i need to have only one panarama viewer in a div externally placed from the slideshow, and but it on top for one panorama, and loading the nwe pano with a new scene ?
Can you think this will correc the memory issue ?

Thanks by advance

Regards

Issue solved.

Putting krpano in just one div under the slidehsow engine, and loading panorama with krpano like scenes.

Memory stay stable in xcode instuments with simulator and fine on device.