为什么我的代码$("input").attr("disabled", "true");写成这样按钮才会灰，反而$("form*").attr("disabled", "true");这样却没效果呢？
<!DOCTYPE html>
<html>
<head>
<title>*选择器</title>
<script src="http://libs.baidu.com/jquery/1.9.0/jquery.js" type="text/javascript"></script>
</head>
<body>
<form action="#">
<input id="Button1" type="button" value="button" />
<input id="Text1" type="text" />
<input id="Radio1" type="radio" />
<input id="Checkbox1" type="checkbox" />
</form>
<script type="text/javascript">
$("input").attr("disabled", "true");
</script>
</body>
</html>
