Search box 2

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/3.1.0/css/font-awesome.min.css">
<div id="search" class="alt">
  <form action="javascript:alert('Inner Function performed!');">
    <input type="text" name="search_query" value="defaultValue" />
    <button type="submit">Search</button>
  </form>
</div>

CSS

#search form {
  text-decoration: none;
  position: relative;
}

#search form button {
  font-size: 0;
  position: absolute;
  right: 0;
  top: 8px;
  background-color: transparent;
  border: 0;
  appearance: none;
}

#search form button:before {
  -moz-osx-font-smoothing: grayscale;
  -webkit-font-smoothing: antialiased;
  font-family: FontAwesome;
  font-style: normal;
  font-weight: normal;
  text-transform: none !important;
  -moz-transform: scaleX(-1);
  -webkit-transform: scaleX(-1);
  -ms-transform: scaleX(-1);
  transform: scaleX(-1);
  color: #7f888f;
  content: '\f002';
  cursor: default;
  display: block;
  font-size: 1.5rem;
  height: 2rem;
  line-height: 2rem;
  opacity: 0.325;
  text-align: center;
  width: 2rem;
}

input[type="text"] {
  height: 2.75em;
}

input[type="text"] {
  -moz-appearance: none;
  -webkit-appearance: none;
  -ms-appearance: none;
  appearance: none;
  background: #ffffff;
  border-radius: 0.375em;
  border: none;
  border: solid 1px rgba(210, 215, 217, 0.75);
  color: inherit;
  display: block;
  outline: 0;
  padding: 0 1em;
  text-decoration: none;
  width: 100%;
}

body,
input,
select,
textarea {
  color: #7f888f;
  font-family: "Open Sans", sans-serif;
  font-size: 13pt;
  font-weight: 400;
  line-height: 1.65;
}