Tryit Editor v1.8

Source Code:

<!DOCTYPE html>
<html>
<body>

<form action="demo_form.asp" accept="image/gif, image/jpeg">
  First name: <input type="text" name="fname"><br>
  Last name: <input type="text" name="lname"><br>
  Your image: <input type="file" name="pic" id="pic"><br>
  <input type="submit" value="Submit">
</form>

<p><b>Note:</b> The &lt;form&gt; accept attribute is not supported in any of the major browsers.</p>

</body>
</html>

Result:

W3Schools.com - Try it yourself

Edit the code above and click "Submit Code" to see the result.