Hi Minakshi,
Yes you can try the first 2 options listed by Rohit, the 3rd one however is not supported.
The below syntax should work for you:
1. gridObject.getQueryObject().setRowCount(<Value>);
2. gridObject.getQueryObject().setParameter("RowCount", <Value>);
You can check the documentation at the following link:
http|s://<host>:<port>/XMII/JSDOC/i5ChartAllClasses.html
You could also use the script assistant to check for the JS methods.
Regards,
Ria