1
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<form action="#">
<button onclick="return true;">submit</button>
<button onclick="return false;">submit</button>
</form>
</body>
</html>
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<form action="#">
<button onclick="return true;">submit</button>
<button onclick="return false;">submit</button>
</form>
</body>
</html>