Responsive HTML5 Contact Form with JS Detection

A flexible and responsive contact form built with HTML5 and CSS3 that include the following features:

• Html5 Placeholder attribute
• New HTML5 Input types
• HTML5 data-* attributes
• JavaScript feature detection
• HTML5 fallback setup

Markup

<form id="contact-form" action="/" method="post">
<div>
<label> <span>Name: (required)</span>
<input placeholder="Please enter your name" type="text" tabindex="1" required autofocus>
</label>
</div>
<div>
<label> <span>Email: (required)</span>
<input placeholder="Please enter your email address" type="email" tabindex="2" required>
</label>
</div>
<div>
<label> <span>Telephone: (required)</span>
<input placeholder="Please enter your number" type="tel" tabindex="3" required>
</label>
</div>
<div>
<label> <span>Website: (required)</span>
<input placeholder="Begin with http://" type="url" tabindex="4" required>
</label>
</div>
<div>
<label> <span>Message: (required)</span>
<textarea placeholder="Include all the details you can" tabindex="5" required></textarea>
</label>
</div>
<div>
<button name="submit" type="submit" id="contact-submit">Send Email</button>
</div>
</form>

CSS

#contact-form input[type="text"],
#contact-form input[type="email"],
#contact-form input[type="tel"],
#contact-form input[type="url"],
#contact-form textarea,
#contact-form button[type="submit"] {
	font:400 12px/12px "Helvetica Neue", Helvetica, Arial, sans-serif;
}
#contact-form {
	text-shadow:0 1px 0 #FFF;
	border-radius:4px;
	-webkit-border-radius:4px;
	-moz-border-radius:4px;
	background:#F9F9F9;
	padding:25px;
}
#contact-form h3 {
	color:#991D57;
	display:block;
	font-size:28px;
}
#contact-form h4 {
	margin:5px 0 15px;
	display:block;
	font-size:13px;
}
#contact-form label span {
	cursor:pointer;
	color:#991D57;
	display:block;
	margin:5px 0;
	font-weight:900;
}
#contact-form input[type="text"],
#contact-form input[type="email"],
#contact-form input[type="tel"],
#contact-form input[type="url"],
#contact-form textarea {
	width:100%;
	box-shadow:inset 0 1px 2px #DDD, 0 1px 0 #FFF;
	-webkit-box-shadow:inset 0 1px 2px #DDD, 0 1px 0 #FFF;
	-moz-box-shadow:inset 0 1px 2px #DDD, 0 1px 0 #FFF;
	border:1px solid #CCC;
	background:#FFF;
	margin:0 0 5px;
	padding:10px;
	border-radius:5px;
}
#contact-form input[type="text"]:hover,
#contact-form input[type="email"]:hover,
#contact-form input[type="tel"]:hover,
#contact-form input[type="url"]:hover,
#contact-form textarea:hover {
	-webkit-transition:border-color 0.3s ease-in-out;
	-moz-transition:border-color 0.3s ease-in-out;
	transition:border-color 0.3s ease-in-out;
	border:1px solid #AAA;
}
#contact-form textarea {
	height:100px;
	max-width:100%;
}
#contact-form button[type="submit"] {
	cursor:pointer;
	width:100%;
	border:none;
	background:#991D57;
	background-image:linear-gradient(bottom, #8C1C50 0%, #991D57 52%);
	background-image:-moz-linear-gradient(bottom, #8C1C50 0%, #991D57 52%);
	background-image:-webkit-linear-gradient(bottom, #8C1C50 0%, #991D57 52%);
	color:#FFF;
	margin:0 0 5px;
	padding:10px;
	border-radius:5px;
}
#contact-form button[type="submit"]:hover {
	background-image:linear-gradient(bottom, #9C215A 0%, #A82767 52%);
	background-image:-moz-linear-gradient(bottom, #9C215A 0%, #A82767 52%);
	background-image:-webkit-linear-gradient(bottom, #9C215A 0%, #A82767 52%);
	-webkit-transition:background 0.3s ease-in-out;
	-moz-transition:background 0.3s ease-in-out;
	transition:background-color 0.3s ease-in-out;
}
#contact-form button[type="submit"]:active {
	box-shadow:inset 0 1px 3px rgba(0,0,0,0.5);
}
#contact-form input:focus,
#contact-form textarea:focus {
	outline:0;
	border:1px solid #999;
}
::-webkit-input-placeholder {
    color:#888;
}
:-moz-placeholder {
    color:#888;
}
::-moz-placeholder {
    color:#888;
}
:-ms-input-placeholder {
    color:#888;
}

Custom JavaScript feature detection

(function() {

	// Create input element for testing
	var inputs = document.createElement('input');
	
	// Create the supports object
	var supports = {};
	
	supports.autofocus   = 'autofocus' in inputs;
	supports.required    = 'required' in inputs;
	supports.placeholder = 'placeholder' in inputs;

	// Fallback for autofocus attribute
	if(!supports.autofocus) {
		
	}
	
	// Fallback for required attribute
	if(!supports.required) {
		
	}

	// Fallback for placeholder attribute
	if(!supports.placeholder) {
		
	}
	
	// Change text inside send button on submit
	var send = document.getElementById('contact-submit');
	if(send) {
		send.onclick = function () {
			this.innerHTML = '...Sending';
		}
	}

})();

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This awesome jQuery plugin is developed by unknown. For more Advanced Usages, please check the demo page or visit the official website.