窗口关闭时导航到url

I am developing a web application for on-line test. For this I have a page Start_test.php which has a start button on click of which new_window opens without tool-bar which is fine. Now, my question is 'When gets completed then this new_window will be closed and start_test.php will be redirected to another page finish.php?' Can I do this?

Yes. In new_window use

function redirect(){
   window.opener.location="finish.php";
}
window.onbeforeunload = redirect;