<form method="get" action="http://sait.com/script/script.php">
<input type="hidden" name="sql" value="blablabla" />
<input type="hidden" name="sql2" value="blabla" />
<input type="text" name="tempo" />
<input type="hidden" name="other" />
<input type="hidden" name="other" />
<input type="hidden" name="otherparameters" />
<input type="submit" value="Напред" />
</form>