title: How to call javascript function inside jQuery
body: <p>We have this  tag with a javascript function in our HTML,</p>
  
  <pre><code>&lt;select name="My_Saved_Billing" onchange="Choose_My_Saved_Billing(this.selectedIndex)" &gt;
      &lt;option&gt;Select&lt;/option&gt;
      &lt;option value="1714"&gt;Address line 1, QC&lt;/option&gt;
  &lt;/select&gt;
  
  &lt;script type="text/javascript"&gt;
  function Choose_My_Saved_Billing(arg_index) {
      switch(arg_index) { 
          // some commands here
      }
  }
  &lt;/script&gt;
  </code></pre>
  
  <p>And I also added a jQuery to it which is below so that on windows load, it will automatically select the second option. </p>
  
  <pre><code>&lt;script type="text/javascript"&gt;
      $(window).load(function(){
          $("select").val($("select option:eq(1)").val());    
      });
  &lt;/script&gt;
  </code></pre>
  
  <p>But is it possible to call javascript function using jQuery? If so, how should I call this one?</p>
  
  <p>Should I use <code>Choose_My_Saved_Billing(this.selectedIndex)</code>or <code>Choose_My_Saved_Billing(arg_index)</code>or you might know something. I've tried these two but none are working. Please let me know. Just a beginner here.</p>