php+javascript เวลาที่บันทึกเสร็จให้แสดงข้อความ ก่อนอื่นต้องบอกว่า มือใหม่นะคะซึ่งไม่มีความรู้เรื่อง

<meta http-equiv="Content-Type" content="text/html; charset=windows-874">
<? 
	include "connect.php";
	$date=date("Y-m-d");
	$redoc=$_POST['redoc'];
	$reopd=$_POST['reopd'];
	?>

<form name="form1" method="post" action="">
<script language="javascript" type="text/javascript"> 
function rec(){ 
    <?
	$sqlre="update  send  set recievedate='$date',redoc='$redoc' ,recopd='$recopd' where an='$an' and cntsend='$cntsend' " ;
	$resultre=mysql_query($sqlre) or die("update error");
	$rowsre=mysql_fetch_array($resultre);					
?>	
alert("save");
} 
</script> 

<table width="673" align="center">
    <tr>
      <td width="89"><div align="left">AN
          
    </div></td>
      <td width="227">
	    <div align="left">
	    <script language="javascript">
	  function(san){
	  <? 
	include "connect.php";
	$an=$_POST["an"];

	$sql="select * from send where an='$an'   ";
	$result=mysql_query($sql) or die ("SQL ERROR");
	$row=mysql_fetch_array($result);
	//$_SESSION['an']=$an;
	//$an=$_SESSION['an'];
	?>}
	  </script>
	    <input name="an" type="text" id="an"
onKeyPress="san"value="<?=$row[0];?>">
	      </div></td>
      <td width="124"><div align="left">ครั้งที่ส่ง</div></td>
      <td width="144">
	  
	    <div align="left">
	      <select name=cntsend onclick=javascript:cntsend.value=cntsend.value ;>
                  <option value="" ></option>
                  <? 
	            $cntsend=$_POST["cntsend"];
	            $sqlcnt="select  cntsend from send where an='$an'";
	            $resultcnt=mysql_query($sqlcnt) or die("SQL ERROR");
		while ($rowcnt=mysql_fetch_array($resultcnt))  {   
		             if($cntsend==$rowcnt[cntsend]){?> 
                                               <option value="<?=$rowcnt[0];?>" selected="select"><?=$rowcnt[0];?> 
                                                </option>
           			<?} else {?>
			     <option value="<?=$rowcnt[0];?>"><?=$rowcnt[0];?> 
			    </option>    <? } ?>  
                                  <? } ?>
                     </select>
	    </div></td>
	     <td width="44"><input type="submit" name="Submit" value="ค้น" onClick="sac"></td>
	  
    </tr>	
	 <script language="javascript">
	 function(sac){
	 <?
	$sqlsec="select  *  from send where an='$an' and cntsend='$cntsend' " ;
	$resultsec=mysql_query($sqlsec) or die("SQL ERROR");
	$rowsec=mysql_fetch_array($resultsec);
	 $sen=explode("-",$rowsec[1]);
	$cday=$sen[2];
	$cmonth=$sen[1];
	$cyear=$sen[0]+543;
	?> }
	 </script>
	
    <tr>
      <td><div align="left"></div></td>
      <td><div align="left"></div></td>
      <td colspan="2"><div align="left"></div></td>
      <td>&nbsp;</td>
    </tr>
	  <tr>
      <td><div align="left">วันที่ส่งคืนแพทย์ 
      </div></td>
      <td><?
	if ($cntsend==""){		$sendd="" ;		}
	else {	$sendd=$cday ."/".$cmonth."/".$cyear ;		}
	?>  
	<div align="left">
	  <input name="senddate" type="text" id="senddate" value="<?=$sendd;?>">   
  		    </div></td>
      <td><div align="left">แพทย์เจ้าของไข้</div></td>
      <td><div align="left">
        <input name="doctor" type="text" id="doctor" value="<?=$rowsec[3];?>"> 
      </div></td>
      <td>&nbsp;</td>
    </tr>

        <tr>
          <td>&nbsp;</td>
          <td>&nbsp;</td>
          <td>&nbsp;</td>
          <td>&nbsp;</td>
          <td>&nbsp;</td>
        </tr>
        <tr>
          <? 
	$sqlcc ="select s.cid,c.cnm from send  s,causeofsend c ";
	$resultcc=mysql_query($sqlcc) or die("sql error");
	$rowcc=mysql_fetch_array($resultcc)
          ?>
          <td><div align="left">สาเหตุที่ส่ง</div></td>
          <td><? if ($cntsend==""){ ?>
            <div align="left">
                <input name="textarea" type="text" value="">
                <? } 
	else { ?> 
                <textarea name="textarea"><?=$rowcc[1]."  ".$rowsec[5];?> </textarea>                
                <? } ?>
	      </div></td>
		
          <td><p align="left">ผลการตอบกลับ</p>
            </td>
          <td><p>
            <label>
            <input type="radio" name="redoc" value="1">
  เห็นด้วย</label>
            <br>
            <label>
            <input type="radio" name="redoc" value="0">
  ไม่เห็นด้วย</label>
            <input name="redoc1" type="hidden" id="redoc1">            
            <br>
          </p>
            </td>
          <td>&nbsp;</td>
        </tr>
        <tr><? 
	  if ($cntsend!="")
	  		if($rowsec[7]=="1"){
	  ?>
	      <td> <div align="left">opd card </div></td>
      <td>  <p align="left"> <input name="recopd" type="radio" value="1">
          รับ opd card</p>
        <p align="left"><input name="recopd" type="radio" value="0">
            ไม่มี opd card </p>
        <? } ?>
        <input name="cntsend1" type="hidden" id="cntsend1">
</td>
      <td><div align="left"></div></td>
      <td><div align="left"></div></td>
      <td>&nbsp;</td>
    </tr>
    <tr>
      <td><div align="left"></div></td>
      <td><div align="left"></div></td>
      <td><div align="left"></div></td>
      <td><div align="left"></div></td>
      <td>&nbsp;</td>
    </tr>
    <tr>
      <td><div align="left"></div></td>
      <td><div align="left"></div></td>
      <td><div align="left">
	 
        <input type="submit" name="Submit" value="บันทึกรับ" onClick="rec";>
      </div></td>
	  
	 <td><div align="left"></div></td>
      <td>&nbsp;</td>
    </tr>
  </table>
</form>