title: Prevent comparevalidator from displaying error until button is clicked
body: <p>I have a password textbox and confirm password textbox in which I use a <code>comparevalidator</code> to make sure that they are equal.  If they aren't, I want the user to receive an error message that says they don't match.  However, I don't want this to display until the user clicks a button.  What is currently happening is that when I tab from the first textbox to the second, I immediately receive that error.  </p>
  
  <p>How can I prevent this error from showing up until after I click a button?</p>