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<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>留言板</title>
<script>
window.onload = filter_words;
function filter_words (){
var words = document.getElementsByName('textarea')[0];
var btn = document.getElementsByName('button')[0];
btn.onclick = function () {
alert(words.value);
}
}
</script>
</head>
<body>
<h3>留言板</h3>
<textarea name="name" cols="40" rows="10"></textarea>
<br>
<button type="button" name="button">提交</button>
</body>
</html>一定要在PHPStudy根目录下使用
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