JSFiddle - React, Tailwind, and code Playground

HTML

<div id="login">

		<h2><span class="fontawesome-lock"></span>Sign In</h2>

		<form action="javascript:void(0);" method="POST">

			<fieldset>

				<p><label for="email">E-mail address</label></p>
				<p class="validationContainer"><div class="validationText">Please enter E-mail</div><input type="email" id="email"></p>

				<p><label for="password">Password</label></p>
                    <p class="validationContainer"><div class="validationText">Please enter password</div><input type="password" id="password"></p> <!-- JS because of IE support; better: placeholder="Email" -->

				<p><input type="submit" value="Sign In"></p>

			</fieldset>

		</form>

	</div> <!-- end login -->

CSS

@charset "utf-8";
/* CSS Document */

/* ---------- FONTAWESOME ---------- */
/* ---------- http://fortawesome.github.com/Font-Awesome/ ---------- */
/* ---------- http://weloveiconfonts.com/ ---------- */

@import url(http://weloveiconfonts.com/api/?family=fontawesome);

/* ---------- ERIC MEYER'S RESET CSS ---------- */
/* ---------- http://meyerweb.com/eric/tools/css/reset/ ---------- */

@import url(http://meyerweb.com/eric/tools/css/reset/reset.css);

/* ---------- FONTAWESOME ---------- */

[class*="fontawesome-"]:before {
  font-family: 'FontAwesome', sans-serif;
}

/* ---------- GENERAL ---------- */

body {
	background-color: #C0C0C0;
	color: #000;
	font-family: "Varela Round", Arial, Helvetica, sans-serif;
	font-size: 16px;
	line-height: 1.5em;
}

input {
	border: none;
	font-family: inherit;
	font-size: inherit;
	font-weight: inherit;
	line-height: inherit;
	-webkit-appearance: none;
}

/* ---------- LOGIN ---------- */

#login {
	margin: 50px auto;
	width: 400px;
}

#login h2 {
	background-color: #f95252;
	-webkit-border-radius: 20px 20px 0 0;
	-moz-border-radius: 20px 20px 0 0;
	border-radius: 20px 20px 0 0;
	color: #fff;
	font-size: 28px;
	padding: 20px 26px;
}

#login h2 span[class*="fontawesome-"] {
	margin-right: 14px;
}

#login fieldset {
	background-color: #fff;
	-webkit-border-radius: 0 0 20px 20px;
	-moz-border-radius: 0 0 20px 20px;
	border-radius: 0 0 20px 20px;
	padding: 20px 26px;
}

#login fieldset p {
	color: #777;
	margin-bottom: 14px;
}

#login fieldset p:last-child {
	margin-bottom: 0;
}

#login fieldset input {
	-webkit-border-radius: 3px;
	-moz-border-radius: 3px;
	border-radius: 3px;
}

#login fieldset input[type="email"], #login fieldset input[type="password"] {
	background-color: #eee;
	color: #777;
	padding: 4px 10px;
	width: 328px;
}

#login fieldset input[type="submit"] {
	background-color: #33cc77;
	color: #fff;
	display: block;
	margin: 0 auto;
	padding: 4px 0;
	width: 100px;
}

#login fieldset input[type="submit"]:hover...

JavaScript

$('form').on('submit', function (e) {
    e.preventDefault();
    var emailBox=$("#email");
    var passBox=$("#password");
    if (!emailBox.val() || !passBox.val()) {
        $(".validationText").text("Please Enter Value").show();
    }
    else if(!IsEmail(emailBox.val()))
    {
        emailBox.prev().text("Invalid E-mail").show();
    }
    $("input#email, input#password").focus(function(){
        $(this).prev(".validationText").hide();
    });    
});
function IsEmail(email) {
  var regex = /^([a-zA-Z0-9_.+-])+\@(([a-zA-Z0-9-])+\.)+([a-zA-Z0-9]{2,4})+$/;
  return regex.test(email);
}