KB151621 - Default Case of Image Map Is Case Sensitive in IIS

Article ID: 151621

Article Last Modified on 6/23/2005

Microsoft Internet Explorer 2.0
Microsoft Internet Explorer 2.0
Microsoft Internet Explorer 2.0
Microsoft Internet Information Server 1.0

This article was previously published under Q151621

We strongly recommend that all users upgrade to Microsoft Internet Information Services (IIS) version 6.0 running on Microsoft Windows Server 2003. IIS 6.0 significantly increases Web infrastructure security. For more information about IIS security-related topics, visit the following Microsoft Web site:

http://www.microsoft.com/technet/security/prodtech/IIS.mspx

SYMPTOMS

When you click an image map using Internet Explorer 2.0, the browser will get stuck in an infinite loop trying to go to the link on the image map. You will see the icon on the title bar flash and the contents of the status bar will flash as Internet Explorer tries to reload the page. You can break out of the loop using the Stop button on the browser.

CAUSE

Given the following image map:

DEFAULT http://server/file.htm
rect (0,1) (170,53) http://server/file1.htm
rect (264,26) (349,53) http://server/file2.htm
rect (187,23) (264,53) http://server/file3.htm

If you click an area not defined by one of the shapes, the DEFAULT case should be returned by the server. Internet Information Server (IIS) returns a Location: header that is blank. This causes Internet Explorer to loop continuously.

WORKAROUND

Change the word DEFAULT in the map file to all lower case.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Internet Information Server version 1.0 and Microsoft Internet Explorer version 2.0. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

Keywords: kbenv KB151621