javascript事件, 解决mousedown和click冲突事件, 鼠标事件, 键盘事件, 文本事件用法简介
事件分类鼠标事件click/mousedown/mousemove/mouseup/contextmenu/mouseover/mouseout/mouseenter/mouseleave用button来区别鼠标的按键DOM3标准规定:click事件只能监听左键,只能通过mousedown和mouseup来判断鼠标键鼠标左键button=0,右键button=2,滑轮button=1eg:vard