There are times when the server needs to get data from the client rather than the other way around. The common way to do this is with a form like this one:
<FORM NAME="seek" METHOD="GET">
<pre>Author: <INPUT TYPE="text" NAME="author" size="20" VALUE="" maxlength="2047"></INPUT>
Title: <INPUT TYPE="text" NAME="title" size="20" VALUE="" maxlength="2047"></INPUT>
</pre>
<INPUT TYPE="submit" VALUE="Submit Query" />
</FORM>