<!DOCTYPE html>
<html>
<body>
<h3>A demonstration of how to access a DATALIST element</h3>
<form>
<input list="myDatalist">
<datalist id="myDatalist">
<option value="Internet Explorer">
<option value="Firefox">
<option value="Chrome">
<option value="Opera">
<option value="Safari">
</datalist>
</form>
<p>Click the button to get the number of option elements in the datalist.</p>
<button onclick="myFunction()">Try it</button>
<p><strong>Note:</strong> The input element's list attribute is used to bind it together with the datalist element.</p>
<p><strong>Note:</strong> The datalist element is not supported in Internet Explorer 9 and earlier versions, or in Safari.</p>
<p id="demo"></p>
<script>
function myFunction() {
var x = document.getElementById("myDatalist").options.length;
document.getElementById("demo").innerHTML = "Found " + x + " options in the list.";
}
</script>
</body>
</html>