title: how to add key and a value to a json using javascript or jquery
body: <p>i have a json variable like this</p>
  
  <pre><code>var jsondata={"all":"true"}
  </code></pre>
  
  <p>i want to push another key and value to the jsondata. after that my jsondata have to be like this.</p>
  
  <pre><code>{"all":"true","FDamount":"false","DDamount":"true"}
  </code></pre>
  
  <p>how to do that??? i tried jsondata.push({"FDamount":"false"}) and jsondata.push("FDamount:false"). both of these method is not working. </p>
  
  <p>thank you</p>