Header() to a different browser instance

Hello List, I've got some javascript that pops up a new browser window. From within that browser I call a php script that does some sql, and then does a Header redirect back to the original page (browser instance). However, with the Header() redirect my original page just gets created inside the second instance popped-up browser. Alternatively, the following just closes the window, and the php script is never called from the form. <input type="submit" name="Submit" value="Add"onClick="closeWindow()"> Can anyone share with me whether it is possible to do what I want to do (essentially close a popped up browser and redirecting the original browser instance), and give some advice on how to do it. Many Thx. - Eric