Updating MySQL using a form my code is not working
<?php
 $host=""; // Host name
 $username=""; // Mysql username
 $password=""; // Mysql password
 $db_name=""; // Database name
 $tbl_name=""; // Table name

 // Connect to server and select database.
 mysql_connect("$host", "$username", "$password")or die("cannot connect");
 mysql_select_db("$db_name")or die("cannot select DB");

 // get value of id that sent from address bar
 $dj=$_GET['dj'];

 // Retrieve data from database
 $sql="SELECT * FROM $tbl_name WHERE dj='$dj'";
 $result=mysql_query($sql);
 $rows=mysql_fetch_array($result);
 ?>

<table width="400" border="0" cellspacing="1" cellpadding="0">
<tr>
<form name="form1" method="post" action="update_ac.php">
<td>
<table width="100%" border="0" cellspacing="1" cellpadding="0">
<tr>
<td>&nbsp;</td>
<td colspan="3"><strong>Update The information for the Now PlayingProgram.</strong>
</td>
</tr>
<tr>
<td align="center">&nbsp;</td>
<td align="center">&nbsp;</td>
<td align="center">&nbsp;</td>
<td align="center">&nbsp;</td>
</tr>
<tr>
<td align="center">&nbsp;</td>
<td align="center"><strong>Name</strong></td>
<td align="center"><strong>Email</strong></td>
<td align="center"><strong>Email2</strong></td>
</tr>
<tr>
<td>&nbsp;</td>
<td align="center">
<input name="name" type="text" id="name" value="<?php echo $rows['name']; ?>">
</td>
<td align="center">
<input name="email" type="text" id="email" value="<?php echo $rows['email']; ?>" size="15">
</td>
<td>
<input name="email2" type="text" id="email2" value="<?php echo $rows['email2']; ?>" size="15">
</td>
</tr>
<tr>
<td align="center">&nbsp;</td>
<td align="center"><strong>Twitter</strong></td>
<td align="center"><strong>Twitter2</strong></td>
<td align="center"><strong>Avatar</strong></td>
</tr>
<tr>
<td>&nbsp;</td>
<td align="center">
<input name="twitter" type="text" id="twitter" value="<?php echo $rows['twitter']; ?>">
</td>
<td align="center">
<input name="twitter2" type="text" id="twitter2" value="<?php echo $rows['twitter2']; ?>" size="15">
</td>
<td>
<input name="avatar" type="text" id="avatar" value="<?php echo $rows['avatar']; ?>" size="15">
</td>
</tr>
<tr>
<td align="center">&nbsp;</td>
<td align="center"><strong>Facebook</strong></td>
<td align="center"><strong>Facebook2</strong></td>
<td align="center"><strong>Type</strong></td>
</tr>
<tr>
<td>&nbsp;</td>
<td align="center">
<input name="facebook" type="text" id="facebook" value="<?php echo $rows['facebook']; ?>">
</td>
<td align="center">
<input name="facebook2" type="text" id="facebook2" value="<?php echo $rows['facebook2']; ?>" size="15">
</td>
<td>
<input name="type" type="text" id="type" value="<?php echo $rows['type']; ?>" size="15">
</td>
</tr>
<tr>
<td align="center">&nbsp;</td>
<td align="center"><strong>Alias1</strong></td>
<td align="center"><strong>Alias2</strong></td>
<td align="center"><strong>Alias3</strong></td>
</tr>
<tr>
<td>&nbsp;</td>
<td align="center">
<input name="alias1" type="text" id="alias1" value="<?php echo $rows['alias1']; ?>">
</td>
<td align="center">
<input name="alias2" type="text" id="alias2" value="<?php echo $rows['alias2']; ?>" size="15">
</td>
<td>
<input name="alias3" type="text" id="alias3" value="<?php echo $rows['alias3']; ?>" size="15">
</td>
</tr>

<tr>
<td align="center">&nbsp;</td>
 <td colspan="3" align="center"><strong>Request Line</strong></td>
</tr>
<tr>
<td>&nbsp;</td>
<td colspan="3" align="center">
 <input name="address" type="text" id="address" value="<?php echo $rows['address']; ?>" size="65">
 </td>
 </tr>
 <tr>
 <td>&nbsp;</td>
 <td>
 <input name="dj" type="hidden" id="dj" value="<?php echo $rows['dj']; ?>">
 </td>
 <td align="center">
 <input type="submit" name="Submit" value="Submit">
 </td>
 <td>&nbsp;</td>
 </tr>
 </table>
 </td>
 </form>
 </tr>
 </table>
  <?php
 // close connection
 mysql_close();
 ?>

<?php
$host="localhost"; // Host name
$username=""; // Mysql username
$password=""; // Mysql password
$db_name=""; // Database name
$tbl_name=""; // Table name

// Connect to server and select database.
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");

// Connect to server and select database.
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");

// update data in mysql database
$sql="UPDATE currentdj SET  name='$name',
                        email='$email',
                        email2='$email2',
                        twitter='$twitter',
                        twitter2='$twitter2',
                        avatar='$avatar',
                        facebook='$facebook',
                        facebook2='$facebook2',
                        type='$type',
                        alias1='$alias1',
                        alias2='$alias2',
                        alias3='$alias3',
                        address='$address'
                        WHERE dj='$dj'";
$result=mysql_query($sql);

// if successfully updated.
if($result){
echo "Successful";
echo "<BR>";
echo "<a href='list_records.php'>View result</a>";
}

else {
echo "ERROR";
}

?>

$email=$_POST['email'];
 $email2=$_POST['email2'];
 $twitter=$_POST['twitter'];

"UPDATE currentdj SET  name='$name',
                        email='$email',    //Add THE MISSING SINGLE QUOTE HERE
                        email2='$email2',

$sql="UPDATE currentdj SET  name='$name',
                        email='$email',
                        email2='$email2',
                        twitter='$twitter',
                        twitter2='$twitter2',
                        avatar='$avatar',
                        facebook='$facebook',
                        facebook2='$facebook2',
                        type='$type',
                        alias1='$alias1',
                        alias2='$alias2',
                        alias3='$alias3',
                        address='$address'
                        WHERE dj='$dj'";