title: How to keep element grayed out unless a conditional is met?
body: <p>I'm in the process of designing a Flash application, and it requires either two or three pieces of data from the user.  The third data element is only relevant if one of the other elements has changed from the default value.</p>
  
  <p>In order to prevent the user from inputting information that would skew the calculations based on the input, how can I gray out the text input box if the default conditional is unchanged?  I could embed a conditional to ignore the input from that particular box, but I know that some users will fill in all data fields regardless of on-screen instructions.</p>