Set Custom Master URL using JS CSOM in SP 2010

Follow belwo link to add button in ribbon. You first need to add your sandbox webpart in site page then open that site page when click on button.

http://msdn.microsoft.com/en-us/library/ff407458%28v=office.14%29.aspx

http://social.technet.microsoft.com/Forums/sharepoint/en-US/dad32867-4d14-4bb4-a791-d46fc2768285/need-to-add-custom-button-to-sharepoint-2010-publishing-pages-ribbon?forum=sharepointgeneralprevious

You need to put your page URL in JS (CommandAction="javascript:window.open(custompageurl)).

Hope it could help

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Hemendra:Yesterday is just a memory,Tomorrow we may never see

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