You need to use the WINDOW.OPEN command for example

newwin=window.open("test.html","hello there");

then you can reference the new window in the current page by using NEWWIN. 
and reference the current page from the window using WINDOW.OPENER.

At 02:41 19/01/02 +0000, you wrote:
>can anyone tell me how to insert a popup window using javascript.how do i
>pass data from the popup window to the main window which is open at that
>time.  a complete simple running coding will be most appreciated...than you