START

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<html> <head> <meta name=“viewport” content=“width=device-width, initial-scale=1”> <style> * {

box-sizing: border-box;

}

#myInput {

background-image: url('/css/searchicon.png');
background-position: 10px 12px;
background-repeat: no-repeat;
width: 100%;
font-size: 16px;
padding: 12px 20px 12px 40px;
border: 1px solid #ddd;
margin-bottom: 12px;

}

#myUL {

list-style-type: none;
padding: 0;
margin: 0;

}

#myUL li a {

border: 1px solid #ddd;
margin-top: -1px; /* Prevent double borders */
background-color: #f6f6f6;
padding: 12px;
text-decoration: none;
font-size: 18px;
color: black;
display: block

}

#myUL li a:hover:not(.header) {

background-color: #eee;

} </style> </head> <body>

<h2>My Phonebook</h2>

<li><a href="#">Adele</a></li>
<li><a href="#">Agnes</a></li>

<li><a href="#">Billy</a></li>
<li><a href="#">Bob</a></li>

<li><a href="#">Calvin</a></li>
<li><a href="#">Christina</a></li>
<li><a href="#">Cindy</a></li>

</ul>

  var input, filter, ul, li, a, i, txtValue;
  input = document.getElementById("myInput");
  filter = input.value.toUpperCase();
  ul = document.getElementById("myUL");
  li = ul.getElementsByTagName("li");
  for (i = 0; i < li.length; i++) {
      a = li[i].getElementsByTagName("a")[0];
      txtValue = a.textContent || a.innerText;
      if (txtValue.toUpperCase().indexOf(filter) > -1) {
          li[i].style.display = "";
      } else {
          li[i].style.display = "none";
      }
  }

} </script>

</body> </html>