ช่วยดูโค็ตให้หน่อย ทำไมบันทึกลงฐานข้อมูลไม่ได้ ช่วยผู้รู้ดูให้หน่อย

<form name="form1"  id="form1" method="post" action="save.php">
                  <strong>วันที่ :
                    <input name="textfield" type="text" id="textfield" value="<? $today_date=date("d-M-Y");
echo "$today_date";?>" size="18" readonly="readonly"/>
                  </strong></label>
                  <div align="left">


                    <p>

<?php
session_start();
mysql_query("SET NAMES UTF8");
$customer_name = $_SESSION['customer_name'];
$customer_id = $_SESSION['customer_id'];
echo"รหัสลูกค้า : <b><input type=\"text\" name=\"customer_id\" value=\"" . $customer_id ."\" readonly=\"readonly\"/></b>&nbsp;&nbsp;";
echo"ชื่อลูกค้า : <b><input type=\"text\" name=\"customer_name\" value=\"" . $customer_name ."\" readonly=\"readonly\" /></b>";
?>
<br />
<br />

  <table width="100%" border="0" cellpadding="0" cellspacing="0">
    <tr>
      <td><table width="100%" border="1" cellpadding="0" cellspacing="0">
        <?
    	include('conn_mysql.php');
		
		$sql = "select * from product ";
		$query = mysql_db_query($dbname,$sql)or die(mysql_error());
		if(mysql_num_rows($query)>0)
			{ 
    ?>
        <tr>
          <td width="5%"><div align="center"><font color="#FF0000">ลำดับ</font></div></td>
          <td width="29%"><div align="center"><font color="#FF0000">ชื่อสินค้า</font></div></td>
          <td width="16%"><div align="center"><font color="#FF0000">ราคา</font></div></td>
          <td width="17%"><div align="center"><font color="#FF0000">จำนวนที่ต้องการซื้อ</font></div></td>
          <td width="15%"><div align="center"><font color="#FF0000">รวมเงิน</font></div></td>
        </tr>
        <?
		while($rsst=mysql_fetch_object($query))
		{
			$product_id = $rsst-> product_id;
			$product_name = $rsst-> product_name;
			$product_price = $rsst->product_price;
			$x++;
    ?>
        <tr>
          <td><div align="center">
              <?=$x?>
              <input type="hidden" name="proid[<?=$x-1;?>]" id="proid[<?=$x-1;?>]" value="<?=$product_id?>">
          </div></td>
          <td><div align="center">
              <?=$product_name?>
          </div></td>
          <td><div align="center">
              <?=$product_price?>
          </div></td>
          <td><div align="center">
                <input type="text" name="num<?=$product_id?>" id="num<?=$product_id?>" autocomplete="off" onKeyDown=" if(this.value==0) this.value = '';"  onKeyUp="if(this.value==0) this.value=0;document.all.total<?=$product_id?>.value= parseFloat(document.all.num<?=$product_id?>.value)*<?=$product_price?>;" value="0">
              </div></td>
          <td><div align="center">
                <input type="text" name="total<?=$product_id?>" id="total<?=$product_id?>" value="0">
              </div></td>
        </tr>
        <?
		}
		}
			else
		{
			echo "<div align=\"center\"><font color=\"#FF0000\" size=\"2\">ไม่มีข้อมูล</font></div>";
		}
    ?>
      </table></td>
    </tr>
    <tr>
      <td><p>
          <label><strong>ราคารวม :</strong>
            <input type="text" name="textfield2" id="textfield2" value="total<?=$product_id?>" />
           
          <strong>บาท          </strong></label>
        <p>
          <input type="submit" name="button2" id="button2" value="สั่งซื้อสินค้า" />s
        </p></td>
    </tr>
    <tr>
      <td>&nbsp;</td>
    </tr>
  </table>
  </form>

<?
	include('conn_mysql.php');
	
	$product_id = $_POST["product_id"];
	$dates = date("Y-m-d");
	
	
		
	for($i=0;$i<count($product_id);$i++)
	{		
		$num = "num".$product_id[$i];
		$num = $_POST["$num"];
		$total = "total".$product_id[$i];
		$total = $_POST["$total"];
		
		$sql = "insert into tborder (customer_id,pricetotal,dates) VALUES ('$customer_id','44','$dates')";
		$query = mysql_db_query($dbname,$sql)or die(mysql_error()); 
		
		$sql2 = "insert into order_details (order_no,product_id,quantity) VALUES ('1','$product_id[$i]','$num')";
		$query = mysql_db_query($dbname,$sql2)or die(mysql_error()); 
	
		echo "<script>alert('บันทึกข้อมูลเรียบร้อย');</script>";
	}

	echo "<script>window.location='ordercustomer.php';</script>";
	mysql_close();   
?>