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<script src="//netdna.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Length Unit Conversion</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
</head>
<body>
<div class="container">
<div class="row">
<div class="col-md-10 col-md-offset-1">
<div class="page-header">
<h2>Length Unit Conversion</h2>
</div>
<form class="form-inline" role="form">
<div class="row">
<div class="col-sm-12 col-lg-5">
<div class="form-group">
<label for="from" class="sr-only">From:</label>
<input type="number" class="form-control" placeholder="From" id="from" required/>
</div>
<div class="form-group">
<label for="unitFrom" class="sr-only">Unit From:</label>
<select class="form-control" id="unitFrom">
<option>centimeter (cm)</option>
<option>foot (ft)</option>
<option>inch (in)</option>
<option>kilometer (km)</option>
