Ejemplo:
http://foro.elhacker.net/buscar/ <input type=radio name=sitesearch value="">
Buscar
<input type=radio name=sitesearch value="elhacker.net" checked>
<FORM method=GET action="http://www.google.com/search">
<input type=hidden name=ie value=UTF-8> <input type=hidden name=oe value=UTF-8> <TABLE align="center" bgcolor="#FFFFFF"> <A HREF="http://www.google.com/"> <IMG SRC="http://www.google.com/logos/Logo_40wht.gif" border="0" ALT="Google"></A>
<td> <font color="#000000" size="2" face="Verdana, Arial, Helvetica, sans-serif"> <INPUT TYPE=text name=q size=31 maxlength=255 value=""> <INPUT type=submit name=btnG VALUE="Buscar" style="font-family: Tahoma; font-size: 10 pt; background-color: #003584; color: #FFFFFF; font-weight: bold; border-left: 1 outset #64A2FF; border-right: 1 outset rgb(0,0,0); border-top: 1 outset #64A2FF; border-bottom: 1 outset rgb(0,0,0)"> <input type=hidden name=domains value="elhacker.net"> [b]
<input type=radio name=sitesearch value=""> Buscar
<input type=radio name=sitesearch value="elhacker.net" checked>[/b]
Buscar en elhacker.net
<br>