HTML DOM 允许 JavaScript 对 HTML 事件作出反应。 - 在线编辑器

          Mouse Over Me
Click Me
<!--
function clickMeEvent(obj) {
  if (obj.innerHTML == "Goodbye") {
    obj.style.display = "none";
  } else if (obj.innerHTML == "Thank You") {
    obj.innerHTML = "Goodbye";
  } else if (obj.innerHTML == "Click Me<br>Click Me Again<br>And Again") {
    obj.innerHTML = "Thank You";
  } else if (obj.innerHTML == "Click Me<br>Click Me Again") {
    obj.innerHTML = obj.innerHTML + "<br>And Again";
  } else {
    obj.innerHTML = obj.innerHTML + "<br>Click Me Again";
  }
}
//-->
        