So, the user clicks the pop-up window link, makes the update or does whatever, and you want them to click the "close window" link, which will close the pop-up and refresh the parent window displaying the new data, images, etc., that they user just completed from the pop-up. Rather than the user having to use the refresh option of the browser. It just makes it a better user experience online. One less step for them to worry about.
Sample HTML code for Close Button
Below is the sample HTML code for a close button on your page to close the pop-up window, and refresh the parent window.
<input type=button onClick="win();" value="Close This Window" style="FONT-SIZE: 10px">