Cách Lấy Giá Trị Từ Text Box Bằng Javascript | Vinh Pham

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Vinh Pham

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28/10/2010

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Javascript

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Leave a comment Cách lấy giá trị từ text box bằng javascript

<html>

<head>

<script type=”text/javascript”>

function gettext(){ var s = document.getElementById(“txtname”).value; alert(s); }

}

</script>

</head>

<body>

<input type=”text” id=”txtname” /> <input type=”button” value=”click here” onclick=”gettext()”/>

</body>

</html>

  • document.getElementById(“txtname”).value: lấy giá trị chúng ta sử dụng cấu trúc như sau document.getElementbyId(“”).value – bên trong giấu “” là ID element ta cần lấy ở đây là txtname;
  • alert(): xuất ra bảng thông báo

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