How do you check for an empty field in a form?
With which programming language?
This Java Script code can help you -
<form name="myForm" action="demo_form.asp" onsubmit="return validateForm()" method="post">First name: <input type="text" name="fname"><input type="submit" value="Submit"></form>
It is nice from you to try to help but this script calls to a function that needs to be (validateForm()) created somewhere...
You forgot to add the code for that function too