title: How to get the value of selected radio button in javascript/jquery
body: <p>Here is the html part:</p>
  
  <pre><code>&lt;input class="demo" radio-value="yes" name="Radios" id="sample1" value="" type="radio"&gt; 
  &lt;input class="demo" radio-value="yes" name="Radios" id="sample2" value="" type="radio"&gt; 
  &lt;input class="demo" radio-value="yes" name="Radios" id="sample3" value="" type="radio"&gt; 
  &lt;input class="demo" radio-value="yes" name="Radios" id="sample4" value="" type="radio"&gt;
  </code></pre>
  
  <p>How can I know which radio button the user is selected and how can I know the value of selected radio button. </p>
  
  <p>I want to get the "radio-value" of the selected button. Because, I will be using value for json input..</p>
  
  <p>How can I do that?? </p>