title: RegularExpressionValidator expression only on submit
body: <p>I'm using a RegularExpressionValidator in ASP.NET on a textbox that requires 10 numbers as input.  My problem is that the error message pops up whenever I switch to a different control. For example: when I enter only 1 number and then switch to a different textbox the error message tells me that I need 10 numbers. </p>
  
  <p>I would like for the REV to only validate when the submit button is pressed. I have tried to add "CauseValidation=False" to the textbox but this didn't solve the problem.</p>
  
  <p>Anyone know the answer?</p>
  
  <p>Thanks</p>