遇到一个很奇怪的现象，就是网页中莫名其妙出现空白的一行。 例如这个 www.gz99.com 的头部和底部部分，都有一行空白的，约 16px 高。查看源代码，结构是没有任何问题，而且用 Firebug 来调试，空白部分似乎不属于任何元素。 而且 Firebug 上显示的代码结构，空白处，也显示为一空白的行，这是怎么回事呢？ 大家是否也有遇到过，指点一下？
显示正常的部分代码： HTML: <!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> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <meta http-equiv="x-ua-compatible" content="ie=7" /> <title>首頁</title> <script language="javascript" type="text/javascript" src="source/script_cookie.js"></script> <script language="javascript" type="text/javascript" src="source/script_common.js"></script> <script language="javascript" type="text/javascript" src="source/script_menu.js"></script> <script language="javascript" type="text/javascript" src="source/script_ajax.js"></script> <script language="javascript" type="text/javascript" src="source/script_face.js"></script> <script language="javascript" type="text/javascript" src="source/script_manage.js"></script> <style type="text/css"> @import url(template/default/style.css); </style> <link rel="shortcut icon" href="image/favicon.ico" /> <link rel="edituri" type="application/rsd+xml" title="rsd" href="xmlrpc.php?rsd=2" /> </head> <body> <div id="append_parent"></div> <div id="ajaxwaitid"></div> <div id="header"> <div class="headerwarp"> 显示不正常的部分代码： HTML: <!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> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <meta http-equiv="x-ua-compatible" content="ie=7" /> <title>首頁</title> <script language="javascript" type="text/javascript" src="source/script_cookie.js"></script> <script language="javascript" type="text/javascript" src="source/script_common.js"></script> <script language="javascript" type="text/javascript" src="source/script_menu.js"></script> <script language="javascript" type="text/javascript" src="source/script_ajax.js"></script> <script language="javascript" type="text/javascript" src="source/script_face.js"></script> <script language="javascript" type="text/javascript" src="source/script_manage.js"></script> <style type="text/css"> @import url(template/default/style.css); </style> <link rel="shortcut icon" href="image/favicon.ico" /> <link rel="edituri" type="application/rsd+xml" title="rsd" href="xmlrpc.php?rsd=2" /> </head> <body> <div id="append_parent"></div> <div id="ajaxwaitid"></div> <div id="header"> <div class="headerwarp">