title: How to turn off error messages in visualforce?
body: <p>I have a VisualForce page that has three functionalities,
  Hence it has three 'public PageReference' subroutines,
  That are called when an action happens in the page [i.e. button]</p>
  
  <p>One of the functionalities requires user input [i.e. inputText],
  So the main APEX code has a variable declaration for that input:</p>
  
  <pre><code>public String UserInput { get; set; }
  </code></pre>
  
  <p>Since each task is not really related,
  When I hit the button on the other two functionalities,
  I get a VisualForce error, 
  Because the inputText object has no user input,</p>
  
  <p>How can I prevent that from happening,</p>
  
  <p>Another way to solve this,
  How do I turn off VisualForce Error messages?
  So I can do error handling from APEX,
  Looking at the debug log file,
  The error is in VisualForce NOT APEX,</p>
  
  <p>Thanks</p>