Prototype - 事件 pointerY() 方法

此方法返回鼠标事件的绝对垂直位置。

语法

Event.pointerY(event);

返回值

返回鼠标事件的绝对垂直位置。

示例

通过在不同位置单击来尝试此示例。

<html>
   <head>
      <title>Prototype examples</title>
      <script type = "text/javascript" src = "/javascript/prototype.js"></script>
      
      <script>
         // Register event 'click' and associated call back.
         Event.observe(document, 'click', respondToClick);
  
         // Callback function to handle the event.
         function respondToClick(event) {
            var x_axis = Event.pointerY(event);
            alert("Vertical position : "  + x_axis);
         }
      </script>
   </head>

   <body>
      <p id = "note">Click anywhere to see the result.</p>
      <p id = "para1">This is paragraph 1</p>
      <p id = "para2">This is paragraph 2</p>
      <div id = "division">This is divsion.</div>
   </body>
</html>

输出

prototype_event_handling.htm

打印页面