Выпадающая форма входа на сайт

Сегодня сделаем простую выпадающую форму залогинивания на сайт. Будем использовать jQuery.

HTML

<nav>
    <ul>
        <li id="login">
            <a class="active" id="login-trigger" href="#">
                Войти <span>&#9650;</span>
            </a>
            <div style="display: block;" id="login-content">
                <form>
                    <fieldset id="inputs">
                        <input id="username" name="Email" placeholder="Ваш Email" required="" type="email">   
                        <input id="password" name="Password" placeholder="Пароль" required="" type="password">
                    </fieldset>
                    <fieldset id="actions">
                        <input id="submit" value="Войти" type="submit">
                        <label><input checked="checked" type="checkbox"> Запомнить</label>
                    </fieldset>
                </form>
            </div>                     
        </li>
        <li id="signup">
            <a href="">Зарегистрироваться</a>
        </li>
    </ul>
</nav>

CSS

nav ul {
  margin: 0;
  padding: 0;
  list-style: none;
  position: relative;
  float: right;
  background: #eee;
  border-bottom: 1px solid #fff;
  -moz-border-radius: 3px;
  -webkit-border-radius: 3px;
  border-radius: 3px;    
}
nav li {
  float: left;          
}
nav #login {
  border-right: 1px solid #ddd;
  -moz-box-shadow: 1px 0 0 #fff;
  -webkit-box-shadow: 1px 0 0 #fff;
  box-shadow: 1px 0 0 #fff;  
}
nav #login-trigger,
nav #signup a {
  display: inline-block;
  *display: inline;
  *zoom: 1;
  height: 25px;
  line-height: 25px;
  font-weight: bold;
  padding: 0 8px;
  text-decoration: none;
  color: #444;
  text-shadow: 0 1px 0 #fff; 
}
nav #signup a {
  -moz-border-radius: 0 3px 3px 0;
  -webkit-border-radius: 0 3px 3px 0;
  border-radius: 0 3px 3px 0;
}
nav #login-trigger {
  -moz-border-radius: 3px 0 0 3px;
  -webkit-border-radius: 3px 0 0 3px;
  border-radius: 3px 0 0 3px;
}
nav #login-trigger:hover,
nav #login .active,
nav #signup a:hover {
  background: #fff;
}
nav #login-content {
  display: none;
  position: absolute;
  top: 24px;
  right: 0;
  z-index: 999;    
  background: #fff;
  background-image: -webkit-gradient(linear, left top, left bottom, from(#fff), to(#eee));
  background-image: -webkit-linear-gradient(top, #fff, #eee);
  background-image: -moz-linear-gradient(top, #fff, #eee);
  background-image: -ms-linear-gradient(top, #fff, #eee);
  background-image: -o-linear-gradient(top, #fff, #eee);
  background-image: linear-gradient(top, #fff, #eee);  
  padding: 15px;
  -moz-box-shadow: 0 2px 2px -1px rgba(0,0,0,.9);
  -webkit-box-shadow: 0 2px 2px -1px rgba(0,0,0,.9);
  box-shadow: 0 2px 2px -1px rgba(0,0,0,.9);
  -moz-border-radius: 3px 0 3px 3px;
  -webkit-border-radius: 3px 0 3px 3px;
  border-radius: 3px 0 3px 3px;
}
nav li #login-content {
  right: 0;
  width: 250px;  
}
/*--------------------*/
#inputs input {
  background: #f1f1f1;
  padding: 6px 5px;
  margin: 0 0 5px 0;
  width: 238px;
  border: 1px solid #ccc;
  -moz-border-radius: 3px;
  -webkit-border-radius: 3px;
  border-radius: 3px;
  -moz-box-shadow: 0 1px 1px #ccc inset;
  -webkit-box-shadow: 0 1px 1px #ccc inset;
  box-shadow: 0 1px 1px #ccc inset;
}
#inputs input:focus {
  background-color: #fff;
  border-color: #e8c291;
  outline: none;
  -moz-box-shadow: 0 0 0 1px #e8c291 inset;
  -webkit-box-shadow: 0 0 0 1px #e8c291 inset;
  box-shadow: 0 0 0 1px #e8c291 inset;
}
/*--------------------*/
#login #actions {
  margin: 10px 0 0 0;
}
#login #submit {        
  background-color: #d14545;
  background-image: -webkit-gradient(linear, left top, left bottom, from(#e97171), to(#d14545));
  background-image: -webkit-linear-gradient(top, #e97171, #d14545);
  background-image: -moz-linear-gradient(top, #e97171, #d14545);
  background-image: -ms-linear-gradient(top, #e97171, #d14545);
  background-image: -o-linear-gradient(top, #e97171, #d14545);
  background-image: linear-gradient(top, #e97171, #d14545);
  -moz-border-radius: 3px;
  -webkit-border-radius: 3px;
  border-radius: 3px;
  text-shadow: 0 1px 0 rgba(0,0,0,.5);
  -moz-box-shadow: 0 0 1px rgba(0, 0, 0, 0.3), 0 1px 0 rgba(255, 255, 255, 0.3) inset;
  -webkit-box-shadow: 0 0 1px rgba(0, 0, 0, 0.3), 0 1px 0 rgba(255, 255, 255, 0.3) inset;
  box-shadow: 0 0 1px rgba(0, 0, 0, 0.3), 0 1px 0 rgba(255, 255, 255, 0.3) inset;    
  border: 1px solid #7e1515;
  float: left;
  height: 30px;
  padding: 0;
  width: 100px;
  cursor: pointer;
  font: bold 14px Arial, Helvetica;
  color: #fff;
}
#login #submit:hover,
#login #submit:focus {        
  background-color: #e97171;
  background-image: -webkit-gradient(linear, left top, left bottom, from(#d14545), to(#e97171));
  background-image: -webkit-linear-gradient(top, #d14545, #e97171);
  background-image: -moz-linear-gradient(top, #d14545, #e97171);
  background-image: -ms-linear-gradient(top, #d14545, #e97171);
  background-image: -o-linear-gradient(top, #d14545, #e97171);
  background-image: linear-gradient(top, #d14545, #e97171);
}    
#login #submit:active {        
  outline: none;
  -moz-box-shadow: 0 1px 4px rgba(0, 0, 0, 0.5) inset;
  -webkit-box-shadow: 0 1px 4px rgba(0, 0, 0, 0.5) inset;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.5) inset;        
}
#login #submit::-moz-focus-inner {
  border: none;
}
#login label {
  float: right;
  line-height: 30px;
}
#login label input {
  position: relative;
  top: 2px;
  right: 2px;
}

JS

Подключаем jQuery и инициализируем скрипт:

<script type="text/jаvascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script>
      $(document).ready(function(){
            $('#login-trigger').click(function(){
                $(this).next('#login-content').slideToggle();
                $(this).toggleClass('active');                    
                
                if ($(this).hasClass('active')) $(this).find('span').html('&#x25B2;')
                    else $(this).find('span').html('&#x25BC;')
                })
      });
</script>