jQuery плагин для показа символов введенных в поле пароля.

HTML

  <form action="#">
    <ol class="forms">
      <li>
         <label for="username">Логин</label>
         <input type="text" name="username" id="username" />
      </li>
      <li>
         <label for="password">Пароль</label>
         <input type="password" name="password" id="password" class="password" />
      </li>
      <li class="buttons">
         <button type="submit">Отправить</button>
      </li>
    </ol>
  </form>

CSS

/* @group forms */
form {
  background: #777;
  border-radius: 10px;
  margin: 40px auto;
  -moz-border-radius: 10px;
  overflow: hidden;
  padding: 40px;
  -webkit-border-radius: 10px;
  width: 300px;
}
.forms {
  list-style: none;
}
.forms li {
  margin-bottom: 5px;
  overflow: hidden;
  width: 100%;
}
.forms .buttons {
  margin-bottom: 0;
}
label {
  background: #cecece;
  border-top-left-radius: 10px;
  border-bottom-left-radius: 10px;
  cursor: pointer;
  display: block;
  float: left;
  margin: 7px 0 0;
  -moz-border-radius-topleft: 10px;
  -moz-border-radius-bottomleft: 10px;
  text-transform: uppercase;
  padding: 5px 15px 5px 10px;
  -webkit-border-top-left-radius: 10px;
  -webkit-border-bottom-left-radius: 10px;
  width: 70px;
}
input {
  background: #ddd;
  border-radius: 10px;
  border: 1px solid #bbb;
  box-shadow: -1px 0 1px rgba(0,0,0,0.25);
  float: right;
  font: inherit;
  font-size: 14px;
  height: 20px;
  margin: 0;
  -moz-border-radius: 10px;
  -moz-box-shadow: -1px 0 1px rgba(0,0,0,0.25);
  outline: none;
  padding: 10px 5px;
  position: relative;
  -webkit-border-radius: 10px;
  -webkit-box-shadow: -1px 0 1px rgba(0,0,0,0.25);
  width: 193px;
}
input:focus {
  background: #eee;
}
button {
  background: #eee;
  border: none;
  border-radius: 5px;
  box-shadow: 0 0 3px rgba(0,0,0,0.25);
  color: #777;
  cursor: pointer;
  float: right;
  font: inherit;
  -moz-border-radius: 5px;
  -moz-box-shadow: 0 0 3px rgba(0,0,0,0.25);
  overflow: visible;
  padding: 5px 10px;
  text-transform: lowercase;
  -webkit-border-radius: 5px;
  -webkit-box-shadow: 0 0 3px rgba(0,0,0,0.25);
  width: auto;
}
.show-password-link {
  background: #777;
  border-radius: 5px;
  color: #ddd;
  font-size: 10px;
  -moz-border-radius: 5px;
  padding: 0 5px;
  text-decoration: none;
  text-transform: lowercase;
  -webkit-border-radius: 5px;
}
.password-showing,
.password {
  padding-right: 45px;
  width: 153px;
}
/* @end */
         .forms li {
             position: relative;
         }
         .show-password-link {
             display: block;
             position: absolute;
             z-index: 11;
         }
        .password-showing {
             position: absolute;
             z-index: 10;
         }

jаvascript

Подключаем jQuery, и плагин:

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>     
<script src="js/jquery.showPassword.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function() {
  $(':password').showPassword({
    linkRightOffset: 5,
    linkTopOffset: 11
  });
});
</script>