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SYMPTOMSAs of Internet Explorer 5, the browser does not refresh pages when the Forward and Back buttons are used. Pages accessed through the navigation history stack are always pulled from the cache. CAUSEThe behavior of Back and Forward was changed to conform to section 13.13 of the HTTP 1.1 specification, which states the following: User agents often have history mechanisms, such as "Back" buttons and history lists, which can be used to redisplay an entity retrieved earlier in a session. STATUSThis behavior is by design. MORE INFORMATION
The Web server is only contacted if the page file is not in the cache. Expiration headers from the server will have no affect over this behavior, as described in the HTTP 1.1 specification.
The "Pragma: no-cache" header is not essential but is recommended to prevent caching problems involving proxy servers and older versions of Internet Explorer.Note that it is essential to use HTTP Headers instead of META HTTP-EQUIV tags. META tags are not evaluated until after downloaded files have already been stored in the cache. REFERENCESSee section 13.13 of Revision 5 to HTTP 1.1 proposed standard: http://www.w3.org/Protocols/HTTP/1.1/draft-ietf-http-v11-spec-rev-05.txtFor more information on Internet Explorer 5's object model support for persistence behaviors, see the DHTML Persistence documentation on the MSDN Online Web Workshop: http://msdn.microsoft.com/workshop/author/persistence/overview.aspFor additional information about Forward and Back button behavior, click the article number below to view the article in the Microsoft Knowledge Base: Q229684 Back Button in Internet Explorer Becomes Unavailable © Microsoft Corporation 1999, All Rights Reserved. Additional query words:
Keywords : kbWinInet kbGrpInet kbIE500 kbCaching kbDSupport kbIEFAQ |
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