JavaScript 获取表单 enctype 属性的方法

<!DOCTYPE html>
<html>
<body>
<form id="frm1" enctype="text/plain">
First name: <input type="text" name="fname" value="Donald"><br>
Last name: <input type="text" name="lname" value="Duck"><br>
</form>
<p>Form data will be encoded as:
<script>
document.write(document.getElementById("frm1").enctype);
</script>
</p>
</body>
</html>

Form data will be encoded as:text/plain