title: how to add two javascript objects
body: <p>i have problem with javascript objects i want to add two objects structure same 
  here they are also first of all they objects is string </p>
  
  <pre><code>data1 = '{"display:[{"counter":"A023","token":"001"}]"}'
  data2 = '{"display:[{"counter":"A013","token":"003"}]"}'
  </code></pre>
  
  <p>expected result 
  new </p>
  
  <pre><code>data = '{"display:[{"counter":"A023","token":"001"}, {"counter":"A013","token":"003"}]"}'
  </code></pre>
  
  <p>i have tried these codes</p>
  
  <pre><code>var data1 = JSON.parse(data1);
  var data1 = JSON.parse(data1);
  var newdata = $.merge(data1.display, data2.display);
  </code></pre>
  
  <p>i cant solve this problem, i don't know how to do it I also tried other codes</p>