//鼠标事件

onclick 鼠标点击右键触发

onmouseover 鼠标经过触发

onmouseout  鼠标离开触发

onfocus  获得鼠标焦点触发

onblur 失去鼠标焦点触发

onmousemove 鼠标移动触发

onmouseup 鼠标弹起触发

onmousedown 鼠标按下触发