MY HTML CODE
Code:
<html>
<head>
    <title>Fill Form</title>
    <link rel="stylesheet" type="text/css" href="page.css">
<script>        
// Helper function
    function upTo(el, tagName) {
    el = el && el.parentNode;
      tagName = tagName.toLowerCase();

     for ( ;el; el = el.parentNode) {
    if (el.tagName
...