Edit list items when click on lookup column item of SharePoint 2010 list using SharePoint designer 2010

Hello,

I am adding an xslt list view web part of list ‘A’ in Custom Edit form of same list. There is a lookup column in my list and the lookup is some other list with in the site.

When I click on the item of lookup column, then current list items should be editable in the dataform web part of the same page.

How do I achieve this using SharePoint Designer 2010.

Please let me know If you need some more clarification on the issue.

Thanks in Advance,

Regards,

Balakrishna M.