Implementing the Float Label Form Pattern

http://webdesign.tutsplus.com/tutorials/ux-tutorials/implementing-the-float-label-form-pattern/?utm_source=CSS-Weekly&utm_campaign=Issue-83&utm_medium=email

by kazu69

HTML

<script src="https://getfirebug.com/firebug-lite.js"></script>

    <section class="container">
        <h1 class="title">Contact Me</h1>
        <form id="form" class="form" action="#" method="get">
            <ul>
                <li>
                    <label for="name">Your Name:</label>
                    <input type="text" placeholder="Your Name" id="name" name="name" tabindex="1" />
                </li>
                <li>
                    <label for="email">Your Email:</label>
                    <input type="email" placeholder="Your Email" id="email" name="email" tabindex="2" />
                </li>
                <li>
                    <label for="message">Message:</label>
                    <textarea placeholder="Message…" id="message" name="message" tabindex="3"></textarea>
                </li>
            </ul>
            <input type="submit" value="Send Message" id="submit"/>
        </form>
    </section>

CSS

/* 
 * CSS Reset
 * http://meyerweb.com/eric/tools/css/reset/ 
 * v2.0 | 20110126
 * License: none (public domain)
*/
html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
	margin: 0;
	padding: 0;
	border: 0;
	font-size: 100%;
	font: inherit;
	vertical-align: baseline;
}
article, aside, details, figcaption, figure, 
footer, header, hgroup, menu, nav, section {
	display: block;
}
body {
	line-height: 1;
}
ol, ul {
	list-style: none;
}
blockquote, q {
	quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
	content: '';
	content: none;
}
table {
	border-collapse: collapse;
	border-spacing: 0;
}

/*
 * Our Custom Styles
 * 
 */

/* General
==================================== */
*, *:before, *:after {
	-moz-box-sizing: border-box; 
	-webkit-box-sizing: border-box; 
	box-sizing: border-box;
}

body {
	background: #eaedf1;
}

body, input, textarea {
    font: 1em/1.5 Arial, Helvetica, sans-serif;
}

.container {
	max-width: 25em;
	margin: 2em auto;
	width: 95%;
	
}

.title {
	font-size: 1.5em; 
	padding: .5em 0;
	text-align: center; 
	background: #323a45;
	color: white;
	border-radius: 5px 5px 0 0;
}

/* Form
==================================== */
.form ul {
	background: white;
	margin-bottom: 1em;
}

.form li {
	border: 1px solid #ccc; 
	border-bottom: 0;
	margin-bottom: 0px; 
	position: relative; 
}

.form li:first-child {
	border-top: 0;
}

.form li:last-child {
	border-bottom: 1px solid #ccc;
}

label {
	font-size: .8125em; /* 13/16 */ 
	position: absolute; 
	top: 1.23em;
	left: 1.23em;
	color: #f1773b;
	opacity:...

JavaScript

/* 
 * Interaction design based on:
 * http://dribbble.com/shots/1254439--GIF-Mobile-Form-Interaction?list=users
 */
$(document).ready(function(){

    // Test for placeholder support
    $.support.placeholder = (function(){
        var i = document.createElement('input');
        return 'placeholder' in i;
    })();

    // Hide labels by default if placeholders are supported
    if($.support.placeholder) {
        $('.form li').each(function(){
            $(this).addClass('js-hide-label');
        });  

        // Code for adding/removing classes here
        $('.form li').find('input, textarea').on('keyup blur focus', function(e){
            
            // Cache our selectors
            var $this = $(this),
                $parent = $this.parent();

            if (e.type == 'keyup') {
                if( $this.val() == '' ) {
                    $parent.addClass('js-hide-label'); 
                } else {
                    $parent.removeClass('js-hide-label');   
                }                     
            } 
            else if (e.type == 'blur') {
                if( $this.val() == '' ) {
                    $parent.addClass('js-hide-label');
                } 
                else {
                    $parent.removeClass('js-hide-label').addClass('js-unhighlight-label');
                }
            } 
            else if (e.type == 'focus') {
                if( $this.val() !== '' ) {
                    $parent.removeClass('js-unhighlight-label');
                }
            }
        });
    }
});