Going out on a limb here. On the assumption that Java Server Pages are like ASPs, that is abc.jsp is a program that builds an HTML page with a <SCRIPT> in it.
The document in the child window can have a script that references the parent window and closes it with
window.opener.close();
If the document in the child window is built by another.jsp then it can close the parent window. The child window has a property, opener, which is the parent window. So you don't have to pass this information, the browser already has it.