i've developed a custom search bar for my wordpress site however i cannot have it to operate....this is actually the html...its simple but not functional i understand its missing something although not sure what

<form id="start" action="/">
    <h1>Search our site</h1>
        <label for="name">Entry</label>
        <input type="text" id="name" size="35" />

  <input type="checkbox" name="posts" id="posts" />
  <input type="checkbox" name="pages" id="pages" />
  <a class="submit" href="#">Submit</a></p>

<p id="credits">&nbsp;</p>