meta是用来在HTML文档中模拟HTTP协议的响应头报文。
meta 标签用于网页的<head>与</head>中，meta 标签的用处很多。
meta 的属性有两种：name和http-equiv。
name属性主要用于描述网页，对应于content（网页内容），
以便于搜索引擎机器人查、分类（目前几乎所有的搜索引擎都使用网上机器人自动查meta值来给网页分类）。
这其中最重要的是description（站点在搜索引擎上的描述）和keywords（分类关键词），
所以应该给每页加一个meta值。比较常用的有以下几个： 
  name 属性 
  1、<meta name="Generator" content="">用以说明生成工具（如Microsoft FrontPage 4.0）等； 
  2、<meta name="KEYWords" content="">向搜索引擎说明你的网页的关键词； 
  3、<meta name="DEscription" contect="">告诉搜索引擎你的站点的主要内容； 
  4、<meta name="Author" contect="你的姓名">告诉搜索引擎你的站点的制作的作者； 
  5、<meta name="Robots" contect= "all|none|index|noindex|follow|nofollow"> 
  其中的属性说明如下： 
  设定为all：文件将被检索，且页面上的链接可以被查询； 
  设定为none：文件将不被检索，且页面上的链接不可以被查询； 
  设定为index：文件将被检索； 
  设定为follow：页面上的链接可以被查询； 
  设定为noindex：文件将不被检索，但页面上的链接可以被查询； 
  设定为nofollow：文件将不被检索，页面上的链接可以被查询。 
  http-equiv属性 
  1、<meta http-equiv="Content-Type" content="text/html;charset=gb_2312-80"> 
和 <meta http-equiv="Content-Language" contect="zh-CN">用以说明主页制作所使用的文字以及语言； 
  又如英文是ISO-8859-1字符集，还有BIG5、utf-8、shift-Jis、Euc、Koi8-2等字符集； 
  2、<meta http-equiv="Refresh" contect="n;url=yourlink">
  定时让网页在指定的时间n内，跳转到页面yourlink； 
  3、<meta http-equiv="Expires" contect="Mon,12 May 2001 00:20:00 GMT">
  可以用于设定网页的到期时间，一旦过期则必须到服务器上重新调用。需要注意的是必须使用GMT时间格式； 
  4、<meta http-equiv="Pragma" contect="no-cache">
  是用于设定禁止浏览器从本地机的缓存中调阅页面内容，设定后一旦离开网页就无法从Cache中再调出； 
  5、<meta http-equiv="set-cookie" contect="Mon,12 May 2001 00:20:00 GMT">
  cookie设定，如果网页过期，存盘的cookie将被删除。需要注意的也是必须使用GMT时间格式； 
  6、<meta http-equiv="Pics-label" contect="">
  网页等级评定，在IE的internet选项中有一项内容设置，可以防止浏览一些受限制的网站，而网站的
限制级别就是通过meta属性来设置的； 
  7、<meta http-equiv="windows-Target" contect="_top">
  强制页面在当前窗口中以独立页面显示，可以防止自己的网页被别人当作一个frame页调用； 
  8、<meta http-equiv="Page-Enter" contect="revealTrans(duration=10,transtion= 50)">和
  <meta http-equiv="Page-Exit" contect="revealTrans(duration=20，transtion=6)">
  设定进入和离开页面时的特殊效果，这个功能即FrontPage中的“格式/网页过渡”，
  不过所加的页面不能够是一个frame页面。
iTransitionType Integer that specifies or receives one of the following values:
0 Box in. 
1 Box out. 
2 Circle in. 
3 Circle out. 
4 Wipe up. 
5 Wipe down. 
6 Wipe right. 
7 Wipe left. 
8 Vertical blinds. 
9 Horizontal blinds. 
10 Checkerboard across. 
11 Checkerboard down. 
12 Random dissolve.
13 Split vertical in.
14 Split vertical out. 
15 Split horizontal in. 
16 Split horizontal out. 
17 Strips left down. 
18 Strips left up. 
19 Strips right down. 
20 Strips right up. 
21 Random bars horizontal. 
22 Random bars vertical. 
23 Random transition from above possible values.
<head>
<link rel="stylesheet" type="text/css" href="style.css" />
</head>script在html中的用法
application/vnd.ms-excel
'ez' => 'application/andrew-inset'
'hqx' => 'application/mac-binhex40'
'cpt' => 'application/mac-compactpro'
'doc' => 'application/msword'
'bin' => 'application/octet-stream'
'dms' => 'application/octet-stream'
'lha' => 'application/octet-stream'
'lzh' => 'application/octet-stream'
'exe' => 'application/octet-stream'
'class' => 'application/octet-stream'
'so' => 'application/octet-stream'
'dll' => 'application/octet-stream'
'oda' => 'application/oda'
'pdf' => 'application/pdf'
'ai' => 'application/postscript'
'eps' => 'application/postscript'
'ps' => 'application/postscript'
'smi' => 'application/smil'
'smil' => 'application/smil'
'mif' => 'application/vnd.mif'
'xls' => 'application/vnd.ms-excel'
'ppt' => 'application/vnd.ms-powerpoint'
'wbxml' => 'application/vnd.wap.wbxml'
'wmlc' => 'application/vnd.wap.wmlc'
'wmlsc' => 'application/vnd.wap.wmlscriptc'
'bcpio' => 'application/x-bcpio'
'vcd' => 'application/x-cdlink'
'pgn' => 'application/x-chess-pgn'
'cpio' => 'application/x-cpio'
'csh' => 'application/x-csh'
'dcr' => 'application/x-director'
'dir' => 'application/x-director'
'dxr' => 'application/x-director'
'dvi' => 'application/x-dvi'
'spl' => 'application/x-futuresplash'
'gtar' => 'application/x-gtar'
'hdf' => 'application/x-hdf'
'js' => 'application/x-javascript'
'skp' => 'application/x-koan'
'skd' => 'application/x-koan'
'skt' => 'application/x-koan'
'skm' => 'application/x-koan'
'latex' => 'application/x-latex'
'nc' => 'application/x-netcdf'
'cdf' => 'application/x-netcdf'
'sh' => 'application/x-sh'
'shar'
=> 'application/x-shar'
'swf' => 'application/x-shockwave-flash'
'sit' => 'application/x-stuffit'
'sv4cpio' => 'application/x-sv4cpio'
'sv4crc' => 'application/x-sv4crc'
'tar' => 'application/x-tar'
'tcl' => 'application/x-tcl'
'tex' => 'application/x-tex'
'texinfo' => 'application/x-texinfo'
'texi' => 'application/x-texinfo'
't' => 'application/x-troff'
'tr' => 'application/x-troff'
'roff' => 'application/x-troff'
'man' => 'application/x-troff-man'
'me' => 'application/x-troff-me'
'ms' => 'application/x-troff-ms'
'ustar' => 'application/x-ustar'
'src' => 'application/x-wais-source'
'xhtml' => 'application/xhtml+xml'
'xht' => 'application/xhtml+xml'
'zip' => 'application/zip'
'au' => 'audio/basic'
'snd' => 'audio/basic'
'mid' => 'audio/midi'
'midi' => 'audio/midi'
'kar' => 'audio/midi'
'mpga' => 'audio/mpeg'
'mp2' => 'audio/mpeg'
'mp3' => 'audio/mpeg'
'aif' => 'audio/x-aiff'
'aiff' => 'audio/x-aiff'
'aifc' => 'audio/x-aiff'
'm3u' => 'audio/x-mpegurl'
'ram' => 'audio/x-pn-realaudio'
'rm' => 'audio/x-pn-realaudio'
'rpm' => 'audio/x-pn-realaudio-plugin'
'ra' => 'audio/x-realaudio'
'wav' => 'audio/x-wav'
'pdb' => 'chemical/x-pdb'
'xyz' => 'chemical/x-xyz'
'bmp' => 'image/bmp'
'gif' => 'image/gif'
'ief' => 'image/ief'
'jpeg' => 'image/jpeg'
'jpg' => 'image/jpeg'
'jpe' => 'image/jpeg'
'png' => 'image/png'
'tiff' => 'image/tiff'
'tif' => 'image/tiff'
'djvu' => 'image/vnd.djvu'
'djv' => 'image/vnd.djvu'
'wbmp' => 'image/vnd.wap.wbmp'
'ras' => 'image/x-cmu-raster'
'pnm' => 'image/x-portable-anymap'
'pbm' => 'image/x-portable-bitmap'
'pgm' => 'image/x-portable-graymap'
'ppm' => 'image/x-portable-pixmap'
'rgb' => 'image/x-rgb'
'xbm' => 'image/x-xbitmap'
'xpm' => 'image/x-xpixmap'
'xwd' => 'image/x-xwindowdump'
'igs' => 'model/iges'
'iges' => 'model/iges'
'msh' => 'model/mesh'
'mesh' => 'model/mesh'
'silo' => 'model/mesh'
'wrl' => 'model/vrml'
'vrml' => 'model/vrml'
'css' => 'text/css'
'html' => 'text/html'
'htm' => 'text/html'
'asc' => 'text/plain'
'txt' => 'text/plain'
'rtx' => 'text/richtext'
'rtf' => 'text/rtf'
'sgml' => 'text/sgml'
'sgm' => 'text/sgml'
'tsv' => 'text/tab-separated-values'
'wml' => 'text/vnd.wap.wml'
'wmls' => 'text/vnd.wap.wmlscript'
'etx' => 'text/x-setext'
'xsl' => 'text/xml'
'xml' => 'text/xml'
'mpeg' => 'video/mpeg'
'mpg' => 'video/mpeg'
'mpe' => 'video/mpeg'
'qt' => 'video/quicktime'
'mov' => 'video/quicktime'
'mxu' => 'video/vnd.mpegurl'
'avi' => 'video/x-msvideo'
'movie' => 'video/x-sgi-movie'
'ice' => 'x-conference/x-cooltalk'

版权声明：本站内容均来自互联网，仅供演示用，请勿用于商业和其他非法用途。如果侵犯了您的权益请与我们联系QQ:729038198，我们将在24小时内删除。