title: Disable input fields in Bootstrap
body: <p>I am having 3 input fields in Bootstrap, if any one of the input field is filled, I want to disable other two.</p>
  
  <p>Lets say I am having A,B,C <em>input</em> boxes.<br>
  If A is filled then B &amp; C will become <code>disabled</code> or <code>readonly</code> and vice versa.</p>
  
  <p>Also if I delete value from A then B &amp; C again become enabled. As B &amp; C was also not filled.</p>