title: ASP.Net TextBox Validation
body: <p>I have 2 textbox controls where date values will be entered. I want it so that if a date is entered into one of the textboxes then the other one becomes required.</p>
  
  <p>This is probably a real noobie question but any help would be greatly appreciated.</p>
  
  <p>Thanks in advance.</p>
  
  <p>Edit: Just to clarify a bit better. I use a compare validator to check if the value entered into the textboxes are dates, so thats not a problem. The problem is that I want some validation so that if a value is entered into one textbox then the other one becomes required. Otherwise if both textboxes are left empty then neither are required. </p>