access value of one page from a popup

I have a jsp page, in which a popup window open when a button is clicked through javascript like this...

<a href="javascript:window.showPopup(<%=SUBJECT_ID_FK%>,<%=SEVERITY_ID_FK%>,<%= HELPDESK_ID %>)" ><img src='blahblah'>....

Now I want to get the value of text area which is on the main page. But I want the value to be displayed on the popup window

How can i do that?

Quick response will be greatly appreciated...

[516 byte] By [ali_hammada] at [2007-11-27 10:29:57]