title: How to create a JavaScript floating div signup form
body: <p>I'm building a site which will have a 'Login/Register' link on every page. Whenever someone clicks this link, I want a JavaScript/div based signup form to float on top of the content with a link to 'close' it if they want.</p>
  
  <p>I also want the capability of the div showing up near the position of their mouse, i.e so if they click the link near the middle of the page it should show up near the middle, and they don't have to scroll all the way to the top to see it. (To clarify, may be it should automatically determine the mouse coordinates or have a way to specify the (x, y) coordinates.)</p>
  
  <p>I'm a good JavaScript developer myself, but not an expert so I'm sure there will be some libraries doing this better than I can. Any links/tutorials to share? </p>