求教一mysql插入数据问题

conn.php

<?php
/*
 * Created on 2012-4-5
 *
 * To change the template for this generated file go to
 * Window - Preferences - PHPeclipse - PHP - Code Templates
 */

 $conn = @ mysql_connect("localhost", "root", "") or die("数据库链接错误");
mysql_select_db("bbs", $conn);
mysql_query("set names 'GBK'"); //使用GBK中文编码;
?>





add.php

<?php
/*
 * Created on 2012-4-6
 *
 * To change the template for this generated file go to
 * Window - Preferences - PHPeclipse - PHP - Code Templates
 */
include("conn.php");
 if($_POST['submit']){
  $sql="insert into message(id,user,title,content.lastdate)" .
  "values('','$_POST[user]','$_POST[title]','$_POST[content]',now())";
mysql_query($sql);
echo "发表成功";
}
  ?>



  <form action="add.php" method="post">
 用户：<input type="text" name="user"/><br>

 标题：<input type="text" name="title"/><br>
 内容：<textarea name="content" ></textarea><br>

  <input type="submit" name="submit" value="提交留言"/>


  </form>

sql语句

CREATE TABLE `message` (
  `id` tinyint(1) NOT NULL auto_increment,
  `user` varchar(25) NOT NULL,
  `title` varchar(50) NOT NULL,
  `content` tinytext NOT NULL,
  `lastdate` date NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=gbk AUTO_INCREMENT=1 ;

不知道是哪里出了问题，一直插入不进数据。。




------解决方案--------------------
$sql="insert into message(id,user,title,content,lastdate)" .
"values('','$_POST[user]','$_POST[title]','$_POST[content]',now())";

content,lastdate 逗号写成.了。