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Javascript Form - 如何get submit按钮名称，类型和值

submit_button 【submit_button】
我们想知道如何get submit按钮名称，类型和值。
代码展示 运行结果 

<html>
<head>
    <script language="JavaScript">
    function openWin(){
      var myInstance = document.myForm.mySubmit;
      console.log("The name is: " + myInstance.name + "<br>");
      console.log("The type is: " + myInstance.type + "<br>");
  
      console.log(myInstance.form.mySubmit.value);
    }
    </script>
</head>
<body>
    <form name="myForm">
      <input type=TEXT value="Hello, World!" name="myText">
    <input type=SUBMIT value="Click to Submit" name="mySubmit"
             onClick="openWin()">
    </form>
</body>
</html>