my code below deletes the text from my textarea that is inserted by a user after clicking the submit button but what i want is i want the text to be in my textarea after submit.

  <form action="/search" name="myform" id="formid" method="post"   >
                      <div class="input-group" >
            <!--          
        
                          <textarea  name="input" id="textArea" />
        
                          
        
        
                            <button type="submit" onclick="return fill()" >Search</button>
                          </button>
        
                      </div>
        
                    </form>
        
        <script type="text/javascript">
                    function fill()
                    {
        
                     var x = document.getElementById('textArea').value;
                     document.getElementById('demo').innerHTML=x;
        
        
        
                    }
                </script>