How to send data from a JSP page to a java class through javascript function?

<html:button property="secrecyComplianceFlag" onClick="selectFromPickList('abc','ijk');" value=" ? ">
</html:button>

function selectFromPickList(pickFlag, pickCode) {
window.open('searchPickList.do?
pickCode='+pickCode+'&pickFlag='+pickFlag+','searchPickList','resizable=1,width=200,height=110,status=1,scrollbars=1');
}

The above code invokes a pop-up window, which is a JSP Page.

In the pop-window Action Class:

String code = request.getParameter("pickCode");