communicate between different pages.

Hi,

I m developing an app for sharePoint 2013 (Sharepoint hosted) using javascript. I have 2 pages called Mainpage and Secondrypages , also one app.js.

Now I want to do is do some work on Mainpage and secondryPages. I can navigate between these pages as I want . But the issue is I dont know how can I do my work on secondrypages. eg- using Mainpage I can add records to Sharepoint list, and display sharepoint list data in a html table on the Mainpage. Now what I want to do is once user select a record from table i want to navigate to one of the secondrypages and display more details about selected record on the table. I want to edit and add some extra value to that particular selected record using secondypage.

so can someone please tell me how can I access other secondypages from my app.js or do I have to create more app.js and how can I communicate between different pages. Please help me im really new to Javascript. Can someone please help with sample codes or any recommended site to learn.

Thanks.

d.n weerasinghe