title: How to prevent page from scrolling when a JQuery button is focused and space-bar is pressed
body: <p>When focus is on a button in a JQuery dialog, the space bar does two things: it selects the button and it scrolls the window. People who are familiar with space bar as a tool for selecting buttons will expect the first but find the second jarring and inappropriate.</p>
  
  <p>So the question: how do I prevent the page from scrolling?  I had thought that it was just a matter of returning false from the button handler but that does not appear to be true.</p>