Q. How can we remove index information of previous tracking attempt's indexed information, from cvar,scope='page' variable ?

Scenario :

I am working currently on project that includes Liferay Portal integrated with Springs and hibernate.

There are two sections on single page

1. Browse section
2. Search section

Search section has one integrated button of Download. In download section, we have applied tracking for few things by using 'setCustomVariable' of piwik.js, and output of call to piwik.php comes like

cvar output(through HTTPFox) :

{"1":Download","155231","3":["source","portal"]}

Now when we apply tracking through 'setCustomVariable' in Browse section(on same page), we get

"1":Download","155231"...

appended to our new piwik.php call. Comes like :

{"1":Download","155231","3":["source","portal"],"9":["ASSET","37"]}

Expected Output :

{"9":["ASSET","37"]}

In next tracking attempt(Browse on same page where search has been done).

Keywords: Custom Variable, cvar, tracking, setCustomVariable