title: javascript conflict issue, I am not able to find what's wrong
body: <p>I am using date picker in my form using <a href="http://code.jquery.com/ui/1.10.3/jquery-ui.js" rel="nofollow">http://code.jquery.com/ui/1.10.3/jquery-ui.js</a>
  using 1.9.1 jquery.js
  But in this file I am getting error</p>
  
  <pre><code>TypeError: $.isPlainObject is not a function
  
  
  if ( $.isPlainObject( value ) ) {
  </code></pre>
  
  <p>So what's going wrong. Please tell me</p>
  
  <p>My index.php code is here</p>
  
  <pre><code> &lt;!-- Load jQuery JS --&gt;
  &lt;script src="http://code.jquery.com/jquery-1.9.1.js"&gt;&lt;/script&gt;
      &lt;!-- Load jQuery UI CSS  --&gt;
  &lt;link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css" /&gt;
  
  
  &lt;!-- Load jQuery UI Main JS  --&gt;
  &lt;script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"&gt;&lt;/script&gt;
  
  &lt;!-- Load SCRIPT.JS which will create datepicker for input field  --&gt;
  &lt;script src="script.js"&gt;&lt;/script&gt;
  </code></pre>