Bootstrap

<!DOCTYPE html>
<form method="POST">
<br>
<center>
<div class="input-prepend">
  <span class="add-on">Username</span>
  <input class="span2" name="username" id="prependedInput" type="text" required/>
</div>
<br>
<div class="input-prepend">
  <span class="add-on">Password</span>
  <input class="span2" name="password" id="prependedInput" type="password" required/>
</div>
<br>
<div class="input-prepend">
  <span class="add-on">Confirm Password</span>
  <input class="span2" name="c_password" id="prependedInput" type="password" required/>
</div>
<br>
<div class="input-prepend">
  <span class="add-on">Email</span>
  <input class="span2" name="email" id="prependedInput" type="email" required/>
</div>
<br>
<div class="input-prepend">
  <span class="add-on">Confirm Email</span>
  <input class="span2" name="c_email" id="prependedInput" type="email" required/>
</div>
<br>
<div class="well well-small">
<img src='./inc/captcha.php' /><br /><br>
<input type="text" name="captcha" placeholder="Please enter the text you see above" required/>
</div>
<input type="submit" name="register" value="register" class="btn btn-info dropdown-toggle">
</form>
</center>