title: Checkbox: disable/enable href in jQuery
body: <p>I want to enable/disable my <code>&lt;a href&gt;</code> button via a checkbox (default = disabled).  Is it possible?</p>
  
  <pre><code>$('#check').change(function() {
  
  });
  </code></pre>
  
  <p>What is the next step? I think I need unbind function?</p>
  
  <p>(I want to disable checkout button until user not clicking on Terms And Conditions checkbox).
  Thanks</p>