dom events w3c dom events EventTarget w3c dom events MouseEvent w3c dom views AbstractView mouseeventimpl uieventimpl mouseevent fscreenx fscreeny fclientx fclienty fctrlkey faltkey fshiftkey fmetakey eventtarget frelatedtarget getscreenx fscreenx getscreeny fscreeny getclientx fclientx getclienty fclienty getctrlkey fctrlkey getaltkey faltkey getshiftkey fshiftkey getmetakey fmetakey eventtarget getrelatedtarget frelatedtarget initmouseevent typearg canbubblearg cancelablearg abstractview viewarg detailarg screenxarg screenyarg clientxarg clientyarg ctrlkeyarg altkeyarg shiftkeyarg metakeyarg buttonarg eventtarget relatedtargetarg fscreenx screenxarg fscreeny screenyarg fclientx clientxarg fclienty clientyarg fctrlkey ctrlkeyarg faltkey altkeyarg fshiftkey shiftkeyarg fmetakey metakeyarg buttonarg frelatedtarget relatedtargetarg super.inituievent typearg canbubblearg cancelablearg viewarg detailarg