You develop a Web page that throws an exception from a function. The function is called through the expando property of a DHTML object. When you use Windows Internet Explorer 7 to view the Web page, the exception handler may not catch this exception.

Note: This problem also occurs in Windows Internet Explorer 6 when at least one parameter is passed to the function from which the exception is thrown. To work around this problem in Internet Explorer 6, see the “Workaround” section.