获取 JS 事件位置

[list]
[*] window.event.screenX (e4)
[*] window.event.screenY (e4)
[*] window.event.clientX (e4)
[*] window.event.clientY (e4)
[*] window.event.x (e4)
[*] window.event.y (e4)
[*]
[*]
[*] event.screenX (N4)
[*] event.screenY (N4)
[*] event.pageX (N4)
[*] event.pageY (N4)
[*] event.width (N4)
[*] event.height (N4)
[*] event.layerX (N4)
[*] event.layerY (N4)
[/list]

  $("#btn1").click( function (event) {
alert(event.screenX );
        //......
  })