我这样写有问题吗?
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>我们互动下</title>
<script type="text/javascript">
function rec(){
var ccp="关注JS高级篇";
alert(ccp);
}
</script>
</head>
<body>
<input name="button" type="button" onClick="rec()" value="JS进阶篇" />
</body>
</html>
系统提示成功过了