title: jQuery: How to open a new modal dialog or popup window
body: <p>There's a login button at the bottom of the homepage.
  I want to open a new frame that works like another web page when I click on the button! But <strong>the popup window should be opened inside the homepage</strong> and located in the center of the homepage! It should be smaller than the homepage.</p>
  
  <p>All I've been looking for is how to open a new tab or a new window.
  I want to know how to open a popup window located in center of the homepage.</p>