title: Get previous month date javascript
body: <p>How can I get previous month date in javascript. Suppose you have today's date like:</p>
  
  <pre><code>var abc = new date(); 
  </code></pre>
  
  <p>It will return today's date for example <code>03-11-2015</code>. Now I want to get <code>03-10-2015</code>. This is 30 days less than todays date. How can I do this?</p>