Problem statement:

I'm working on web application which is developed in Umbraco CMS .Net framework. and I want to add one html form in existing umbraco page. When I add my html form and run the application that time umbraco add one parent form to my form. And when I try to post my form through JavaScript it gives me error "Uncaught TypeError: Cannot read property 'submit' of null".

.

See below code.

  <form action="a"> // Umbraco predefined form appears after run which we can't remove <input.../> 

      <form name="myform" action="b"> // My form goes here.      
        <input.../>  
        <input.../>  
        <input.../>    
      </form>
 <input.../>
 </form>


 <script>    
      document.getElementById("myform").submit(); //it gives me error : Uncaught TypeError: Cannot read property 'submit' of null
 </script>