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If you use a script to hide a SELECT control or to make the control visible in Windows Internet Explorer 7, the left mouse button no longer functions.
This problem occurs because the SELECT control takes capture. However, the capture is hidden by the script before the SELECT control releases the capture. The message handler of the SELECT control does not process any messages if the capture is hidden. Therefore, the mouse becomes unresponsive.
Security update information
To resolve this problem, install the most current cumulative security update for Internet Explorer. To install the most current updates, visit the following Microsoft Web site:
Note This update was first included in security update 953838 (MS08-045). For more information, click the following article number to view the article in the Microsoft Knowledge Base:
953838 MS08-045: Cumulative security update for Internet Explorer