title: How to disable one radio input from radio group?
body: <p>How can i disable the one radio input from the radio group ?</p>
  
  <pre><code>&lt;input type="radio" name="radiogrp" value="op1" checked="checked"&gt;Option1
  &lt;input type="radio" name="radiogrp" value="op2"&gt; Option2
  &lt;input type="radio" name="radiogrp" value="op3" &gt; Option3
  &lt;input type="radio" name="radiogrp" value="op4"&gt; Option4
  </code></pre>
  
  <p>My question is i want to disable option1 after clicking on any other button</p>
  
  <p>For example:</p>
  
  <blockquote>
    <p>when i select option2, than option1 should be disabled</p>
  </blockquote>