firefox 中不支持keyCode
ie9-- 不支持which
firefox:上下左右键会触发kepress.
chrome: 上下左右键不会触发kepress.
oprea:上下左右键不会触发kepress.
safari:上下左右键不会触发kepress.
IE:上下左右键不会触发kepress.
firefox 中不支持keyCode
ie9-- 不支持which
firefox:上下左右键会触发kepress.
chrome: 上下左右键不会触发kepress.
oprea:上下左右键不会触发kepress.
safari:上下左右键不会触发kepress.
IE:上下左右键不会触发kepress.