title: MVC 3 - Set non-required field to required at the client side
body: <p>I'm building an MVC 3 application.</p>
  
  <p>Can I set a non-required field to required in the client-side(using JavaScript / jQuery)?</p>
  
  <p>I need it to be dynamically when things change in the page.</p>
  
  <p>UPDATE: I viewed the source code of my page and saw the window.mvcClientValidationMetadata array which validation-rules are pushed into it. Can I use it for my needs?</p>
  
  <p>Thanks</p>