HOWTO: Detecting Whether the Freiburg Patch is Installed
ID: Q176794
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The information in this article applies to:
-
Microsoft Internet Explorer (Programming) version 4.0
SUMMARY
It is possible to use script to detect whether a patch has been applied to
Internet Explorer. This article explains how to detect whether the Freiburg
patch has been installed on an Internet Explorer 4.0 browser.
MORE INFORMATION
Details of the Freiburg Text-Viewing Issue can be found on
http://www.microsoft.com/. Search for "Freiburg".
A patch for Internet Explorer is assigned a number. The format of this
number is always ";<number>;" This number is valid only for the base
product for which the patch applies. The Frieberg patch is number 51 and
applies to the Internet Explorer version 4.00. Number 51 for any other
version of the Explorer will probably be a different or non-existent patch.
The appMinorVersion will be incremented with each Service Pack. A patch may
indicate that a service pack also implements a patch. If Service Pack 1
were to be released for Internet Explorer 4.0, this service pack would
include the fix for the "Freiburg" issue.
To make a valid robust detection script for a patch, you must do the
following in order:
- Check the product version.
- Check the service pack level.
- Check the patch number.
The following script checks for the existence of the Freiburg patch:
<SCRIPT>
function window.onload()
{
// This patch only applies to IE 4.00
if (navigator.appVersion.indexOf("MSIE 4.0;") != -1)
{
ServicePackLevel = 0;
SPIndex = navigator.appMinorVersion.indexOf(";SP");
// Service Pack 1, if released, will include this fix
if (SPIndex != -1)
{
ServicePackLevel =
navigator.appMinorVersion.substring( SPIndex+3,
navigator.appMinorVersion.indexOf(";", SPIndex+2));
}
// This is IE 4.00 with the Freiburg patch
if ((navigator.appMinorVersion.indexOf(";51;") != -1) ||
(ServicePackLevel >= 1))
{
alert("You have the patch");
}
else
{
alert("You do not have the patch");
}
}
else
{
// Not IE 4.00 - The patch is not relevant to earlier versions
// and will be incorporated into later versions
}
}
</SCRIPT>
Additional query words:
QFE patch
Keywords : kbcode AXSDKScripting
Version : WINDOWS:4.0
Platform : WINDOWS
Issue type : kbhowto