title: How to validate ID number in asp.net?
body: <p>I am new at this so be easy on me... :)</p>
  
  <ol>
  <li>I need to validate if a the ID number that the user typed in my site is a valid ID.</li>
  </ol>
  
  <p>How do I check it?</p>
  
  <p>Do I need to use RegularExpressionValidator?</p>
  
  <ol start="2">
  <li>More over, I also need to validate the credit card number, I found a few RegularExpressions for that in the net but each one is different from the other and I am not sure which one to use..
  Does anyone know od a working expression that will suit all credit cards??</li>
  </ol>
  
  <p>Thanks,
  Tsil.</p>