What is this code? Nefarious?

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Someone unknow posted the code below on a forum I visit and I wonder if it's
something more than a Google search bar.

The line:

<input type="hidden" name="client" value="pub-4318146509275872"></input>

seems suspect, but I'm not savvy enough to tell

<!-- Search Google -->
<form method="get" action="http://www.google.com/custom" target="_top">
<table bgcolor="#ffffff">
<tr><td nowrap="nowrap" valign="top" align="left" height="32">
<a onMouseOver="(window.status='Open link in new window...'); return true"
onMouseOut="(window.status=''); return true" href="http://www.google.com/">
<img src="http://www.google.com/logos/Logo_25wht.gif" border="0" alt="Google"
<label for="sbi" style="display: none">Enter your search terms</label>
<input type="text" name="q" size="50" maxlength="255" value="" id="sbi"></input>
<label for="sbb" style="display: none">Submit search form</label>
<input type="submit" name="sa" value="Search" id="sbb"></input>

<input type="hidden" name="client" value="pub-4318146509275872"></input>

<input type="hidden" name="forid" value="1"></input>
<input type="hidden" name="ie" value="ISO-8859-1"></input>
<input type="hidden" name="oe" value="ISO-8859-1"></input>
<input type="hidden" name="cof"
<input type="hidden" name="hl" value="en"></input>
<!-- Search Google -->

Re: What is this code? Nefarious?

Quoted text here. Click to load it

It's a pretty normal thing to use <input type=hidden ....> to hold
variables, that shouldn't be displayed, to be passed onto the
processing page. Since the handling url are all google, if it's used
for anything nefarious, only Google will know :p

But in all likelihood, without looking at more google search bar codes
elsewhere, it appears to be just a way for google to tell which
customer's site are you coming from.
A Lost Angel, fallen from heaven
Lost in dreams, Lost in aspirations,
Lost to the world, Lost to myself

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