anirudh-eka/form-validator.js

## form-validator.js
// shorthand for $(document).ready();
$(function(){

  $('form').on('submit', function(e){
    e.preventDefault();

    var email_regex = new RegExp("[a-zA-Z]+[@][a-zA-Z]+[.][a-z]{2,}");
    var email_input = $('input[type=text]').val();
    var email_match = email_regex.test(email_input);
    if (email_match == false){
      $('#errors').append('<li>Must be a valid email address</li>');
    };


    var pw_input = $('input[type=password]').val();
    var pw_check_one = /\d{1,}/
    var pw_check_two = /[A-Z]{1,}/
    var pw_check_three = /[\d\w]{8,}/
    if (pw_check_one.test(pw_input) == false) {
      $('#errors').append('<li>Password must have at least one numeric character(0-9)</li>');
    };

    if (pw_check_two.test(pw_input) == false) {
      $('#errors').append('<li>Password must have at least one capital letter</li>');
    };

    if (pw_check_three.test(pw_input) == false) {
      $('#errors').append('<li>Password must be at least 8 characters long</li>');
    };

  });
});

## index.html
<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <link rel="stylesheet" href="main.css">
    <title>Form Validation</title>
  </head>
  <body>
    <form name="sign_up" action="#" method="post">
      <label for="email">Email</label>
      <input type="text" name="email" />
      <label for="password">Password</label>
      <input type="password" name="password" />

      <button type="submit">Sign Up</button>

      <ul id="errors"></ul>
    </form><body>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
    <script src="form-validator.js"></script>
  </body>
</html>

## main.css
ul#errors {
  color: red;
}
	// shorthand for $(document).ready();
	$(function(){

	$('form').on('submit', function(e){
	e.preventDefault();

	var email_regex = new RegExp("[a-zA-Z]+[@][a-zA-Z]+[.][a-z]{2,}");
	var email_input = $('input[type=text]').val();
	var email_match = email_regex.test(email_input);
	if (email_match == false){
	$('#errors').append('<li>Must be a valid email address</li>');
	};


	var pw_input = $('input[type=password]').val();
	var pw_check_one = /\d{1,}/
	var pw_check_two = /[A-Z]{1,}/
	var pw_check_three = /[\d\w]{8,}/
	if (pw_check_one.test(pw_input) == false) {
	$('#errors').append('<li>Password must have at least one numeric character(0-9)</li>');
	};

	if (pw_check_two.test(pw_input) == false) {
	$('#errors').append('<li>Password must have at least one capital letter</li>');
	};

	if (pw_check_three.test(pw_input) == false) {
	$('#errors').append('<li>Password must be at least 8 characters long</li>');
	};

	});
	});
	<!doctype html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<link rel="stylesheet" href="main.css">
	<title>Form Validation</title>
	</head>
	<body>
	<form name="sign_up" action="#" method="post">
	<label for="email">Email</label>
	<input type="text" name="email" />
	<label for="password">Password</label>
	<input type="password" name="password" />

	<button type="submit">Sign Up</button>

	<ul id="errors"></ul>
	</form><body>
	<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
	<script src="form-validator.js"></script>
	</body>
	</html>