AFAICT this works correctly as documented at MDC: https://developer.mozilla.org/en/DOM/event.clientY I think you need to add window.scrollY/X to get what you want. https://developer.mozilla.org/en/DOM/window.scrollY -> INVALID
Status: UNCONFIRMED → RESOLVED
Last Resolved: 9 years ago
Resolution: --- → INVALID
Please also note that the Firefox version you're using is old. It has several known security issues: http://www.mozilla.org/security/known-vulnerabilities/firefox30.html I would recommend updating to the latest 3.0.x version ASAP. (Help->Check For Updates...)
I test it in firefox 3.0 , 3.5 , ie6, opera and chrome In the ie and both version of firefox it dosn't work correctly, but in hte opera and chrome it's fine. using of window.scrollY/X can make this true in firefox. But I guess "clientY" must return the vertical position of the element in the page when the event occur. as this link(https://developer.mozilla.org/en/DOM/event.clientY) said : Returns the "vertical coordinate <<within>> the application's client area at which the event occurred". It just happened to me, and I thought that may help you to make firefox better. ;)
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