出错的提示框
echo "<Script Language=‘Javascript‘>"; echo "alert(‘提示：用户名密码错误，请重新输入！‘);"; echo "history.go(-1);"; echo "</Script>";
验证通过后
echo "<script>location.replace(‘manage.php‘);</script>";
PHP登陆提示信息框代码
原文：http://www.cnblogs.com/shanmao/p/3516595.html
