title: How to center image gallery?
body: <p>I've used the following code to create an image gallery:<a href="http://www.w3schools.com/css/css_image_gallery.asp" rel="nofollow">http://www.w3schools.com/css/css_image_gallery.asp</a></p>
  
  <p>It aligns it to the left. I have 9 images in the gallery. What I want to do is have 3 rows by 3 columns of images aligned in the center of the page with margins on both sides but I can't seem to figure it out.</p>