JavaScript HTML、键盘与鼠标事件基础示例

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>HTML文件</title>
  <script>
    window.οnlοad=function () {
      var d=document.getElementById('d');
      //内容发生改变，并焦点发生改变，才可以监听到
      d.οnchange=function () {
        alert('内容发生改变')
      }
    }
  </script>
</head>
<body>
<input type="text" id="d" value="">
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>键盘事件</title>
  <script>
    window.οnlοad=function () {
      window.οnkeypress=function (e) {
       //  alert(e.key)//弹出按键对应的字母
       //  alert(e.keyCode)
        if (e.charCode==103){
          alert('G键被点击')
        }
      }
    }
  </script>
</head>
<body>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>鼠标事件</title>
  <script>
    window.οnlοad=function () {
      var input=document.getElementById('b');
      input.οnclick=function () {
        alert('按钮被点击了');
      }
      var c= document.getElementById('c');
      c.οndblclick=function () {
        alert('双击')
      }
    }
  </script>
</head>
<body>
<input type="button" id="b" value="点击">
<input type="button" id="c" value="双击">
</body>
</html>