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In ra thông báo khi click vào button bằng Javascript
CĂN BẢN
DOM & BOM
XỨ LÝ FORM
JAVASCRIPT TIPS
TUTORIALS
CÁC CHỦ ĐỀ
BÀI MỚI NHẤT
In ra thông báo khi click vào button bằng Javascript
Hãy viết chương trình khi click vào một button thì xuất hiện một thông báo với nội dung "Chào mừng bạn đến với freetuts.net".

Bài viết này được đăng tại freetuts.net, không được copy dưới mọi hình thức.
Bạn tạo một input, sau đó thêm sự kiện khi click vào input đó thì sẽ alert lên câu thông báo như đề bài đưa ra.
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Javascript Example</title>
</head>
<body>
<h2>In ra một thông báo khi click vào button</h2>
<input type="button" id="btn" value="Show Alert"/>
<script language="javascript">
var button = document.getElementById("btn");
button.onclick = function(){
alert("Chào mừng bạn đến với freetuts.net");
}
</script>
</body>
</html>
Bài viết này được đăng tại [free tuts .net]
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