<form id="cse-search-box" action="http://google.com/cse">
  <input type="hidden" name="cx" value="YOUR SEARCH ENGINE ID goes here" />
  <input type="hidden" name="ie" value="UTF-8" />
  <input type="text" name="q" size="31" />
  <input type="submit" name="sa" value="Search" />
</form>