title: how to implement a login dialog box popping within the page
body: <p>I want to design a webpage login that when click on the login button a login box pops on the same page (not in a new window) while the page itself becomes "disabled". </p>
  
  <p>I am stuck at how to start implementing this. I wonder if this can be done using jquery? Any suggestions would be apprecieted. Thanks!</p>