$(function(){
      var w=0,tip=$("<b>");
      tip.css({
   "z-index":99999,position:"absolute",color:"red",display:"none"
              }),
      $("body").append(tip),//頁面創建b標簽用來顯示數字
      $(document).on("click",function(e){
            var x=e.pageX,y=e.pageY;//獲取點擊頁面坐標
            tip.text("+"+ ++w).css({//數字加1
              display:"block",top:y-15,left:x,opacity:1//定位顯示
            }).stop(!0,!1).animate({//stop(stopAll,goToEnd),如果發生多次點擊時，要停止上一個動畫的執行
                              top:y-180,opacity:0},800,function(){
                                        tip.hide()
                                    }),
            e.stopPropagation()
      });
});