title: How can I check any of radio button is not selected
body: <p>I want to check whether any of radio button is not checked.How can I do it?</p>
  
  <pre><code>    $(document).ready(function(){
  
       $('#delete_btn').click(function(){ as answer
           if ( !($("RadioGroup1").is(':checked')) )// THis line is not wirking..I need the code for this line
  { 
  
  
               }else{
  //message
          }
  </code></pre>