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Asked: 2026-05-15T01:09:20+00:00

OP, please replace this text with a detailed description of your problem. Your code

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OP, please replace this text with a detailed description of your problem. Your code is below.

I used document.getElementById but the math is not working. I need total to be calculated:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title></title>
<script type = "text/javascript">
function a()
{

var q = document.getElementById('ad').value;
document.getElementById('s').value=q  + q;
}

</script>
</head>
<?php 
$con = mysql_connect("localhost","root","");
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }

mysql_select_db("form1", $con);


error_reporting(E_ALL ^ E_NOTICE);
$nam=$_GET['msg'];

 $row=mysql_query("select * from inv where Name='$nam'");
while($row1=mysql_fetch_array($row))
{ 
$Name=$row1['Name'];
  $Address =$row1['Address'];
  $City=$row1['City'];
    $Pincode=$row1['Pincode'];
  $No=$row1['No'];
  $Date=$row1['Date'];
  $DCNo=$row1['DCNo'];
  $DcDate=$row1['DcDate'];
  $YourOrderNo=$row1['YourOrderNo'];
  $OrderDate=$row1['OrderDate'];
  $VendorCode=$row1['VendorCode'];
  $SNo=$row1['SNo'];
  $descofgoods=$row1['descofgoods'];
  $Qty=$row1['Qty'];
  $Rate=$row1['Rate'];
  $Amount=$row1['Amount'];
}

?>
<body>
<form id="form1" name="form1" method="post" action="">
  <table width="846" border="0">
    <tr>
      <td width="411" height="113">&nbsp;</td>
      <td width="412">&nbsp;</td>
    </tr>
  </table>
  <table width="846" border="0">
    <tr>
      <td height="38">&nbsp;</td>
    </tr>
  </table>
  <table width="846" border="0">

    <tr>
      <td width="390" rowspan="4">&nbsp;</td>
      <td width="92" height="35">&nbsp;</td>
      <td width="136"><?php echo $No;?></td>
      <td width="36">&nbsp;</td>
      <td width="170"><?php echo $Date;?></td>
    </tr>
    <tr>
      <td height="37">&nbsp;</td>
      <td><?php echo $DCNo;?></td>
      <td>&nbsp;</td>
      <td><?php echo $DcDate;?></td>
    </tr>
    <tr>
      <td height="34">&nbsp;</td>
      <td><?php echo $YourOrderNo;?></td>
      <td>&nbsp;</td>
      <td><?php echo $OrderDate;?></td>
    </tr>
    <tr>
      <td height="29">&nbsp;</td>
      <td><?php echo $VendorCode;?></td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
  </table>
  <table width="845" border="0">
    <tr>
      <td height="38">&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
    <tr>
      <td width="34">&nbsp;</td>
      <td width="457">&nbsp;</td>
      <td width="104">&nbsp;</td>
      <td width="79">&nbsp;</td>
      <td width="149">&nbsp;</td>
    </tr>
      <?php $i=1;  
    $row=mysql_query("select * from inv where Name='$nam'");
while($row1=mysql_fetch_array($row))
{ 
$descofgoods=$row1['descofgoods'];
  $Qty=$row1['Qty'];
  $Rate=$row1['Rate'];
  $Amount=$row1['Amount'];
?>
            <tr>
              <td><?php echo $i;?></td>
              <td><?php echo $descofgoods;?></td>
              <td><?php echo $Qty;?></td>
              <td><?php echo $Rate;?></td>
              <td><input name="Amount" type = "text" id ="ad" value="<?php echo $Amount;?>" /></td>
            </tr>   


    <?php  $i++;} ?>
  </table>
  <table width="844" border="0">
    <tr>
      <td width="495" height="1065">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
        <input type="text" name="textfield2" />        &nbsp; &nbsp; &nbsp; &nbsp; </td>
      <td width="191">&nbsp;</td>
      <td width="144"><input type="text" name="tot" id="s" onclick="a()"; /></td>
    </tr>
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1 Answer

  1. Editorial Team

    You can’t use document.getElementById(‘ad’) since that would only return you one single element (which works if only one row is returned by the SQL query).

    Instead use document.getElementsByName(‘Amount’) (note that the parameter is case-sensitive) since that will return you an array of multiple elements with the name Amount that you can iterate over and compute the total.

    You’ll need to change your Javascript function a(). see below.

    function a()
{
    var q = document.getElementsByName('Amount');
    var count = 0;
    for (i = 0; i < q.length; i++)
        count += parseInt(q[i].value,10);
    document.getElementById('s').value = count;
}
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