網頁上添加一個input file HTML控件：
<input id="File1" type="file" />
默認是這樣的，所有文件類型都會顯示出來，如果想限制它只顯示我們設定的文件類型呢，比如“word“,”excel“,”pdf“文件
解決辦法是可以給它添加一個accept屬性，比如：
<input id="File1" type="file" accept=".xls,.doc,.txt,.pdf" />
這樣選擇的時候默認會顯示為這樣：
文件選擇框內只顯示出你自定義文件類型的文件，也還比較方便。
不過這只是最簡單的掩人耳目的做法，還是能選擇其它文件類型：
所以，如果要做到真正意義上限制類型做法（其實這種算不上限制，只是把你要的文件類型默認顯示出來而已，并不是說不能選擇其它的），還是要通過js或者后臺來控制。
附支持的文件類型：
*.3gpp audio/3gpp， video/3gpp 3GPP Audio/Video
*.ac3 audio/ac3 AC3 Audio
*.asf allpication/vnd.ms-asf Advanced Streaming Format
*.au audio/basic AU Audio
*.css text/css Cascading Style Sheets
*.csv text/csv Comma Separated Values
*.doc application/msword MS Word Document
*.dot application/msword MS Word Template
*.dtd application/xml-dtd Document Type Definition
*.dwg image/vnd.dwg AutoCAD Drawing Database
*.dxf image/vnd.dxf AutoCAD Drawing Interchange Format
*.gif image/gif Graphic Interchange Format
*.htm text/html HyperText Markup Language
*.html text/html HyperText Markup Language
*.jp2 image/jp2 JPEG-2000
*.jpe image/jpeg JPEG
*.jpeg image/jpeg JPEG
*.jpg image/jpeg JPEG
*.js text/javascript， application/javascript JavaScript
*.json application/json JavaScript Object Notation
*.mp2 audio/mpeg， video/mpeg MPEG Audio/Video Stream， Layer II
*.mp3 audio/mpeg MPEG Audio Stream， Layer III
*.mp4 audio/mp4， video/mp4 MPEG-4 Audio/Video
*.mpeg video/mpeg MPEG Video Stream， Layer II
*.mpg video/mpeg MPEG Video Stream， Layer II
*.mpp application/vnd.ms-project MS Project Project
*.ogg application/ogg， audio/ogg Ogg Vorbis
*.pdf application/pdf Portable Document Format
*.png image/png Portable Network Graphics
*.pot application/vnd.ms-powerpoint MS PowerPoint Template
*.pps application/vnd.ms-powerpoint MS PowerPoint Slideshow
*.ppt application/vnd.ms-powerpoint MS PowerPoint Presentation
*.rtf application/rtf， text/rtf Rich Text Format
*.svf image/vnd.svf Simple Vector Format
*.tif image/tiff Tagged Image Format File
*.tiff image/tiff Tagged Image Format File
*.txt text/plain Plain Text
*.wdb application/vnd.ms-works MS Works Database
*.wps application/vnd.ms-works Works Text Document
*.xhtml application/xhtml+xml Extensible HyperText Markup Language
*.xlc application/vnd.ms-excel MS Excel Chart
*.xlm application/vnd.ms-excel MS Excel Macro
*.xls application/vnd.ms-excel MS Excel Spreadsheet
*.xlt application/vnd.ms-excel MS Excel Template
*.xlw application/vnd.ms-excel MS Excel Workspace
*.xml text/xml， application/xml Extensible Markup Language
*.zip aplication/zip Compressed Archive
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持腳本之家。
