Sample HTML Search Form

<form method="GET" action="http://search.mycompany.com/search">
   <input type="text" name="q" size="32" maxlength="256" value="query string">
   <input type="submit" name="btnG" value="Google Search">
   <input type="hidden" name="site" value="default_collection">
   <input type="hidden" name="client" value="default_frontend">
   <input type="hidden" name="output" value="xml_no_dtd">
   <input type="hidden" name="proxystylesheet" value="default_frontend">
</form> 

Note: Method must be get, and action must be the search url on your server.