openlayers/openlayers — pull request #787 by ahocevar (2012-12-07 20:13:46+00:00)
Title: Wheel handler does not work on IE when interval is set

Because our event handling assigns `window.event` to browser event listeners in IE, we need to store the event properties for use in a delayed function. Otherwise the delayed function uses `window.event` again, which may have changed or been discarded in the meantime.

This issue can be seen when trying the mouse wheel in IE in the mobile-wmts-vienna.html example.