用户单击“提交”按钮时,校验文本框中的录入,并按照js代码中的文本进行校验提示
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>DOM</title>
</head>
<body>
<form>
<input );
}
}
</script>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>DOM</title>
</head>
<body>
<form>
<input );
}
}
</script>
</body>
</html>