Say I have a wordpress search box that searches the site for whatever is typed into the text field. Like so:
<form action="<?php bloginfo('siteurl'); ?>" method="get">
<input name="s" type="text" value="Search here..." />
<input id="sermon_search_submit" type="submit" value="GO!" />
</form>
This searches the entire site fine, but how would I make it only search on a certain page. For example I want to search all the posts on a certain page. How would I specify that?