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MimeType

�ͻ��֧�ֵ�һ�� MIME(�ಿ��ʼ��չ��Multipart Internet Mail Extension) ��͡�

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�㲻��Ҫ��д�� MimeType ��Щ��Ԥ�ȶ�� JavaScript ��ͨ�� navigator �� Plugin �� mimeTypes ��Щ��

navigator.mimeTypes[index]
�� index ��Ǳ��ɿͻ��֧�ֵ� MIME ��͵��ֵ��Ҳ��ǰ�� MimeType ��(�� MimeType.type ��)��ַ��

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ÿ�� MimeType �� mimeTypes ��е�һ��Ԫ�ء�mimeTypes �� navigator �� Plugin ��һ��ԡ��磬�±��ʾ JPEG ͼ��ֵ��һ��ܽ᣺

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navigator.mimeTypes["image/jpeg"].type image/jpeg
navigator.mimeTypes["image/jpeg"].description JPEG Image
navigator.mimeTypes["image/jpeg"].suffixes jpeg, jpg, jpe, jfif, pjpeg, pjp
navigator.mimeTypes["image/jpeg"].enabledPlugins null

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description MIME ��͵��
enabledPlugin ��Ϊ�� MIME ��úõ� Plugin ��á�
suffixes �г��˸� MIME ��Ϳ��ܶ�Ӧ�ļ��չ��ַ��硰mpeg, mpg, mpe, mpv, vbs, mpegv��
type �� MIME ��͵��ƣ��硰video/mpeg��audio/x-wav��

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��Ĵ��뽫��ʾ�ͻ��ÿ�� MimeType �� type��description��suffixes �� enabledPlugin ��ԣ�

document.writeln("<TABLE BORDER=1><TR VALIGN=TOP>",
   "<TH ALIGN=left>i",
   "<TH ALIGN=left>type",
   "<TH ALIGN=left>description",
   "<TH ALIGN=left>suffixes",
   "<TH ALIGN=left>enabledPlugin.name</TR>")
for (i=0; i < navigator.mimeTypes.length; i++) {
   document.writeln("<TR VALIGN=TOP><TD>",i,
      "<TD>",navigator.mimeTypes[i].type,
      "<TD>",navigator.mimeTypes[i].description,
      "<TD>",navigator.mimeTypes[i].suffixes)
   if (navigator.mimeTypes[i].enabledPlugin==null) {
      document.writeln(
      "<TD>��",
      "</TR>")
   } else {
      document.writeln(
      "<TD>",navigator.mimeTypes[i].enabledPlugin.name,
      "</TR>")
   }
}
document.writeln("</TABLE>")

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i type description suffixes enabledPlugin.name
0 audio/aiff AIFF aif, aiff LiveAudio
1 audio/wav WAV wav LiveAudio
2 audio/x-midi MIDI mid, midi LiveAudio
3 audio/midi MIDI mid, midi LiveAudio
4 video/msvideo Video for Windows avi NPAVI32 Dynamic Link Library
5 * Netscape Default Plugin Netscape Default Plugin
6 zz-application/zz-winassoc-TGZ TGZ ��

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navigator, navigator.mimeTypes, Plugin

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description

�ÿɶ��ĸ� MIME ��Ͷ��͡�

��Դ MimeType
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ʵ�ְ汾 Navigator 3.0

enabledPlugin

Ϊ�ض�� MIME ��úõ� Plugin �� MIME ��û��ò�� enabledPlugin Ϊ�ա�

��Դ MimeType
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ʵ�ְ汾 Navigator 3.0

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ʹ�� enabledPlugin ��Ծ��ĸ��Ϊ�ض�� MIME ��õġ�ÿ��֧�ֶ�� MIME ��ͣ��ÿ�� MIME ��Ҳ�ɱ��֧�֡��һ�� MIME ��ֻ�ܱ��һ��(�� Macintosh �� Unix �ϣ��û��Ϊÿ�� MIME ��ÿ��Ƴ�� Windows �ϣ��Ƴ��ʱȷ��ġ�)

enabledPlugin ��ǶԸ�ָ�� MIME ��õĲ�� Plugin ��á�

��Ҳ��Ҫ֪��һ�� MIME ��õ��ĸ��磬��û��֧��ĳ MIME ��͵Ĳ��ʱ��̬��һ�� EMBED ��ǩ��

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��ӽ�ȷ��Ƿ��װ�� Shockwave ��Ѿ��װ�˵Ļ��ʾһ��ӰƬ��

// �ȼ��Ƿ��ʾ Shockwave ӰƬ��
mimetype = navigator.mimeTypes["application/x-director"]
if (mimetype) {
   // ��ǵĻ��ٿ��ܲ��ò��ʾӰƬ��
   plugin = mimetype.enabledPlugin
   if (plugin)
      // ��ǵĻ��ͽ�ӰƬǶ�뵽��ǰ�ĵ��
      document.writeln("��ⲿӰƬ��<EMBED SRC=mymovie.dir HEIGHT=100 WIDTH=100>")
      else
      // ��Ļ��ṩһ��ӰƬ��ӡ�
      document.writeln("<A HREF='mymovie.dir'>��</A>�ۿ�ӰƬ��")
   } else {
   // ��Ļ��ʾ��
   document.writeln("��ź��ܲ��ⲿ��ӰƬ��")
}

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