右键菜单 + 鼠标position

				$(":not(#popupDiv)").bind("mousedown", function(event) {
					if(event.button == 2) {
						$("#popupDiv").css("position", "absolute");
						$("#popupDiv").css("top", event.clientY + "px");
						$("#popupDiv").css("left", event.clientX + "px");
						$("#popupDiv").css("width", "70px");
						$("#popupDiv").css("height", "100px");
						$("#popupDiv").css("display", "block");
					} 

        //鼠标坐标
        event.screenX / Y
        event.clientX / Y
				});