You can easily add a Google or Yahoo Search Engine to your site.
Google

For a Google Search toolbar add this code as a Widget to your Wikispace:

<!-- Google search -->
<div style="width:130px;float:left;text-align:center;position:relative;top:-8px"><a href="http://www.google.com/" style="padding:0;background-image:none"><img src="http://www.google.com/logos/Logo_40wht.gif" alt="Google" style="border:none" /></a></div>
<form method="get" action="http://www.google.com/search" style="margin-left:135px">
<div><input type="hidden" name="domains" value="en.wikipedia.org" /> <input type="hidden" name="num" value="50" /> <input type="hidden" name="ie" value="utf-8" /> <input type="hidden" name="oe" value="utf-8" /> <input type="text" name="q" size="31" maxlength="255" value="dfdf" /> <input type="submit" name="btnG" value="Google Search" /></div>
<div style="font-size:90%"><input type="radio" name="sitesearch" id="gwiki" value="en.wikipedia.org" checked="checked" /><label for="gwiki">Wikipedia</label> <input type="radio" name="sitesearch" id="gWWW" value="" /><label for="gWWW">WWW</label></div>
</form>



Yahoo
Yahoo!


Copy and paste this code as a Widget

<div style="clear:left;margin-top:10px"><!-- Yahoo! search -->
<div style="width:130px;float:left;text-align:center;clear:left"><a href="http://search.yahoo.com/" style="padding:0;background-image:none"><img src="http://us.i1.yimg.com/us.yimg.com/i/us/search/ysan/ysanlogo.gif" alt="Yahoo!" style="border:none" /></a></div>
<form method="get" action="http://search.yahoo.com/search" style="margin-left:135px">
<div><input type="hidden" name="x" value="op" /> <input type="hidden" name="va_vt" value="any" /> <input type="text" name="va" size="31" value="dfdf" /> <input type="submit" value="Yahoo! Search" /></div>
<div style="font-size:90%"><input type="radio" name="vs" id="ywiki" value="en.wikipedia.org" checked="checked" /><label for="ywiki">Wikipedia</label> <input type="radio" name="vs" id="yWWW" value="" /><label for="yWWW">WWW</label></div>
</form>
</div>