<link rel="stylesheet" type="text/css" href="<%=path%>/css/styles.css">
<script language="javascript">
$(document).ready(function() {
document.write("ddddd"); }); </script>
<script language="javascript" src="js/jquery.min.js"></script>
</head>
<body >
请输入用户名： <input type="text" id="inputtext" > <input type="button" value="校验">
<div id="error"></div>
</body>
<script language="javascript">
$(document).ready(function() {
document.write("ddddd"); }); </script>
<script language="javascript" src="js/jquery.min.js"></script>
</head>
<body >
请输入用户名： <input type="text" id="inputtext" > <input type="button" value="校验">
<div id="error"></div>
</body>
<script language="javascript" src="js/jquery.min.js"> </script>
<script language="javascript">
$(document).ready(function() {
document.write("ddddd");
});
</script>
</head>
<body>
请输入用户名： <input type="text" id="inputtext" > <input type="button" value="校验">
<div id="error"> </div>
</body>
将jQuery包放在前面.