Last-Minute Checking Before Form Submission
<html> <head> <title>Validator</title> <script type="text/javascript"> function checkForm(form) { for (var i = 0; i < form.elements.length; i++) { if (form.elements[i].type == "text" && form.elements[i].value == "") { document.write("Fill out ALL fields."); return false; } } return true; } </script> </head> <body> <form onsubmit="return checkForm(this)"> Please enter all requested information:<br> First Name:<input type="text" name="firstName"><br> Last Name:<input type="text" name="lastName"><br> Rank:<input type="text" name="rank"><br> Serial Number:<input type="text" name="serialNumber"><br> <input type="submit"> </form> </body> </html>