<!DOCTYPE html>
<html>
<head>
</head>
<body>
<form>
<select id="mySelect">
<option>Apple</option>
<option>Pear</option>
<option>Banana</option>
<option>Orange</option>
</select>
</form>
<p>There are <span id="demo">0</span> options in the list.</p>
<script>
document.getElementById("demo").innerHTML =
document.getElementById("mySelect").length;
</script>
</body>
</html>