Javascript DOM How to - Refer to HTML elements by ID

Question

We would like to know how to refer to HTML elements by ID.

Answer


<!DOCTYPE html>
<html>
<head>
<script type='text/javascript'
  src='http://code.jquery.com/jquery-1.6.2.js'></script>
<script type='text/javascript'>
$(window).load(function(){<!-- www . j a va 2s .  c  o m-->
    $(document).ready(function(){
        mypara.innerText += " world";
    });
});
</script>
</head>
<body>
  <p id="mypara">Hello</p>
</body>
</html>

The code above is rendered as follows: