<form method="get" action="<TMPL_VAR SEARCHACTION>" id="searchform">
<div>
+<input type="hidden" id="searchdo" name="do" value="search" />
+<TMPL_LOOP NAME="SEARCHDB">
+<input type="hidden" id="searchdb" name="DB" value="<TMPL_VAR DB>" />
+</TMPL_LOOP>
<input type="text" id="searchbox" name="P" value="" size="16"
-<TMPL_IF HTML5>placeholder="search"</TMPL_IF> />
+<TMPL_IF HTML5>placeholder="search <TMPL_LOOP NAME="SEARCHDB"
+><TMPL_UNLESS NAME="__first__">, </TMPL_UNLESS
+><TMPL_VAR DB></TMPL_LOOP>"</TMPL_IF> />
</div>
</form>