title: Chrome blocking of additional dialogs? Javascript manipulation?
body: <p>Chrome gives you the option of blocking additional alert boxes on a website.</p>
  
  <p>How exactly do they do this? Do they directly manipulate your javascript, because somewhere in your code, you will have <code>alert('hello');</code> So what happens to this code once the user ticks "prevent this site creating additional dialogs"?</p>