Knowing which Row was selected when Hide/Show is clicked

Hi everyone,
I have an advanced table, with some search criteria that works. I have added a "detail" flag and when I click the link Hide/Show, the details are displayed.
How can I get in the code which Hide/Show link was clicked? I am more interesting in getting the Row from the VO which the Hide/Show link was clicked?
When I get the "event" parameter from the pageContext (pageContext.getParameter("event") ) it returns "hide" or "show", but I don't know which was row that was clicked.
What I am trying to accomplish is the following. In my advanced table I have "Select" checkBoxes. I want to add the "Hide/Show details" functionality and try to have the details displayed in an advanced table with its own "Select" checkBoxes.
Can it be done?

Hi,
Create a Primary Key in View Object's Query for the table.
Now to know on which row hide/show has been clicked you need to capture the row reference which is nothing but Primary Key for that row.
Use this code in processformrequest:
if(("hide".equalsIgnoreCase(pageContext.getParameter("event"))))
String rowReference = pageContext.getParameter(OAWebBeanConstants.EVENT_SOURCE_ROW_REFERENCE);
TestMassDeleteSearchVORowImpl row = (TestMassDeleteSearchVORowImpl)am.findRowByRef(rowReference);
String lname = (String) row.getSelectFlag();//to get the value of checkbox
Thanks,
Gaurav

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