title: Validate Input Dialog box
body: <p>HI, I feel rather stupid asking this as I should be able to do it but I can't! I have also checked on the net and in my book and for such a simple thing there is nothing (or I can see it).</p>
  
  <p>What I wanna do is present a user with a JOptionPane.showInputDialog(null,... and check</p>
  
  <ol>
  <li>it is not blank</li>
  <li>it does not contain numbers or special characters like />&lt;.!"£$%^&amp;*() </li>
  </ol>
  
  <p>if it fails any of these tests to re-show the box so they have to do it, eurgh this is such a simple thing but I just can't work it out :(</p>
  
  <p>Please have pitty on my stupidity! Thanks for any help in advance it is appericiated!</p>