動態-建立/設定/讀取

<!DOCTYPE html>

<html>

<body>

<p>Click the button to create a Text Field.</p>

function myFunction() {

var x = document.createElement("INPUT");

  x.setAttribute("type", "text");

  x.setAttribute("value", "Hello World!");

  x.setAttribute("id", "dytext");

  document.body.appendChild(x);

var s= document.getElementById("dytext");

}

</script>

</body>

</html>

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