Where is sy1.php? ?

//超链接

echo "<tr onmouseOver='overTr(this)'onmouseOut='outTr(this)'><td colspan='7'align='center'>";

echo"<a href='sy1.php?y={$prey}'><<</a> ";

echo "<font face='隶书'color='#663399'>{$year}年</font> ";

echo "<a href='sy1.php?y={$nexty}'>>></a> ";

echo" ";

echo"<a href='sy1.php?m={$prem}'><</a> ";

echo "<font face='隶书'color='#663399'>{$mon}月</font> ";

echo "<a href='sy1.php?m={$nextm}'>></a>";

echo "</td></tr>";

echo "<tr onmouseOver='overTr(this)'onmouseOut='outTr(this)'><td colspan='7'>";

echo "<div>$convert 对应的农历时间：$time</div>";

echo "</td></tr>";

echo "</table>";

echo "</div>";