多级目录之间跳转：
1.由上到下：Admin/Admin_Login.aspx
2.由上到下：../Default.aspx
<%@ page language="C#" autoeventwireup="true" inherits="Admin_left, www_deploy" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head /></td>
</tr>
</table>
</div>
</form>
</body>
</html>