How to pass portlet param name from a Javascript to the action phase of a portlet ?

Issue

• How to get form name in action phase when portlet param is passed through a JavaScript.

• There is a page which creates a URL in javascript.

formObj.action = "<portlet:actionURL><portlet:param name='MyForm' value='submit'/></portlet:actionURL>";

The form is submitted but in the processAction() value is returned null

 ActionRequest.getParameter("MyForm").