title: Validation field value format
body: <p>I have a field on a form called "PartNumber". What I want to do is: the field value to respect some standard/validation:</p>
  
  <p>digit,digit,digit,letter,digit,digit,digit,digit,digit</p>
  
  <p>So, 3 digits 1 letter 5 digits. Also, I have a "Save" button. If the user enters, for example, 123F45156 and then Save => OK. But if the user enters 1565515156 then Save => a messagebox will appear. </p>
  
  <p>I will appreciate your help! Thanks</p>