Problem in Subtraction

Quote:

Originally Posted by Nile

Please dont double post.

Code:

<script type="text/javascript"> var subtract = function(c, b, output){ output.value = c.value-b.value; } </script> <input type="text" id="c" value="0"/>-<input type="text" id="b" value="0"/>=<input type="text" id="a" value="0"/> <script type="text/javascript"> document.getElementById('c').onmousedown = function(){ subtract(document.getElementById('c'), document.getElementById('b'), document.getElementById('a')); } document.getElementById('b').onmousedown = function(){ subtract(document.getElementById('c'), document.getElementById('b'), document.getElementById('a')); } </script>

I have code for press enter key like this:

Code:

<script language="javascript"> function handleEnter(e, nextfield) { var characterCode = (e && e.which)? e.which: e.keyCode; if(characterCode == 13) { document.getElementById(nextfield).focus(); return false; } else { return true; } } </script>

In my real webpage the following textfield is input qty, output qty, id#, mc# ,and qty. It is possible that after I input number in output qty automatic the result will be appear in qty?

Thank you..I'm sorry if i accidentall double post my thread.

I dont understand? Just play around with my code..

What is the condition for only the operation name oper 1,oper 3, and oper 4 would only subtract the input and output?

Thank you..

I will try to add the code that you given in my webpage code.

Thank you so much

Quote:

Originally Posted by Nile

I dont understand? Just play around with my code..

Did you see my previous posted code which is the real code of my webpage?In that code I want to add the code for subtraction.

Copy and paste my code where you want it and use it accordingly

Quote:

Originally Posted by Nile

I dont understand? Just play around with my code..

Did you see my previous post, my webpage code?

Yes, I did. If my code above was not what you wanted could you explain it in different words?

Quote:

Originally Posted by Nile

Copy and paste my code where you want it and use it accordingly

PHP Code:

<?php include("config.php"); $rexist = 0; if($_POST["no"]) { $clt_date = $_POST["date"]; $query = "INSERT INTO clt (no, ac2l, b3, type, roll, t_date, date) VALUES ('" . $_POST["no"] . "', '" . $_POST["ac2l"] . "', '" . $_POST["b3"] . "', '" . $_POST["type"] . "', '" . $_POST["roll"] . "', now(), '" . $date . "')"; $result = mysql_query($query); $transact_id = mysql_insert_id(); $opname = $_POST["opname"]; $timein = $_POST["timein"]; $timeout = $_POST["timeout"]; $inqty = $_POST["inqty"]; $iun = $_POST["iun"]; $outqty = $_POST["outqty"]; $oun = $_POST["oun"]; $idno = $_POST["idno"]; $mcno = $_POST["mcno"]; $varqty = $_POST["varqty"]; $varsublot = $_POST["varsublot"]; $dateshift = $_POST["dateshift"]; $shift = $_POST["shift"]; $totalarr = count($opname) - 1; for($ctr=0; $ctr < $totalarr; $ctr++) { $inqty[$ctr] = (float) $inqty[$ctr]; $varqty[$ctr] = (float) $varqty[$ctr]; $outqty[$ctr] = (float) $outqty[$ctr]; $query = "INSERT INTO traceability (operation_name, time_in, time_out, input_qty, input_unit, output_qty, output_unit, id_no, mc_no, variance_qty, variance_sublot, date, shift, transact_id) VALUES ('" . $opname[$ctr] . "', '" . $timein[$ctr] . "', '" . $timeout[$ctr] . "', '" . $inqty[$ctr] . "' , '" . $iun[$ctr] . "' ,'" . $outqty[$ctr] . "', '" . $oun[$ctr] . "' , '" . $idno[$ctr] . "', '" . $mcno[$ctr] . "', '" . $varqty[$ctr] . "', '" . $varsublot[$ctr] . "', '" . $dateshift[$ctr] . "', '" . $shift[$ctr] . "', '" . $transact_id . "')"; $result = mysql_query($query); } } $rexist = 0; ?> <html> <head> <script language="javascript"> function handleEnter(e, nextfield) { var characterCode = (e && e.which)? e.which: e.keyCode; if(characterCode == 13) { document.getElementById(nextfield).focus(); return false; } else { return true; } } </script> <script type="text/javascript"> var subtract = function(inqty, outqty, result){ result.value = inqty.value-outqty.value; } </script> <script type="text/javascript"> document.getElementById('inqty').onmousedown = function(){ subtract(document.getElementById('inqty'), document.getElementById('outqty'), document.getElementById('varqty')); } document.getElementById('outqty').onmousedown = function(){ subtract(document.getElementById('inqty'), document.getElementById('outqty'), document.getElementById('varqty')); } </script> </head> <body onLoad="document.type.no.focus();">  <?php include("menu.php"); ?> <form action="main.php" method="post" name="type"> <?php $rexist = 1; echo "<p>No:<input type='text' name='_no' onkeypress='return handleEnter(event,\"date\");' /><br />"; echo "Date:;<input type='text' name='date' onkeypress='return handleEnter(event,\"ac2l\");' /></p>"; echo "<table>"; echo "<tr><th class='myclass'>TRACEABILITY</th><th class='myclass'>LOT #</th></tr>"; echo "<tr><td>AC2L</td><td><input type='text' name='ac2l' id='ac2l' onkeypress='return handleEnter(event,\"b3\");' /></td></tr>"; echo "<tr><td>B3</td><td><input type='text' name='b3' id='b3' onkeypress='return handleEnter(event,\"type\");' /></td></tr>"; echo "<tr><td>Type</td><td><input type='text' name='type' id='type' onkeypress='return handleEnter(event,\"roll\");' /></td></tr>"; echo "<tr><td>Roll</td><td><input type='text' name='roll' id='roll' onkeypress='return handleEnter(event,\"timein0\");' /></td></tr>"; echo "</table>"; echo "<p> </p>"; $query = "SELECT * FROM trace_operations ORDER BY operation_name"; $last_operation_name = ""; $result = mysql_query($query); if($result) { $rexist = 1; echo "<p><center><b>TRACEABILITY</center></b></p>"; echo "<table>"; echo "<tr><th class='myclass'>OPERATIONS</th><th class='myclass'>Time IN</th><th class='myclass'>Time OUT</th><th class='myclass'>INPUT <br/> QTY</th><th class='myclass'>UNIT</th><th class='myclass'>OUTPUT QTY</th><th class='myclass'>UNIT</th><th class='myclass'>NAME & ID #</th><th class='myclass'>MC #</th><th class='myclass'>VARIANCE Qty</th><th class='myclass'>VARIANCE Sub Lot</th><th class='myclass'>DATE</th><th class='myclass'>SHIFT</th></tr>"; $totalrows = mysql_num_rows($result); $trows = $totalrows - 1; for($ctr = 0; $ctr < $trows; $ctr++) { $row = mysql_fetch_array($result); $tctr = $ctr + 1; echo "\n\t<tr>"; echo "\n\t\t<td>"; if ($last_operation_name != $row["operation_name"]) echo $row["operation_name"]; $last_operation_name = $row["operation_name"]; echo "<input type='hidden' name='opname[]' value='" . $row["operation_name"] . "' /></td>"; echo "\n\t\t<td><input type='text' name='timein[]' id='timein" . $ctr . "' onkeypress='return handleEnter(event,\"timeout" . $ctr . "\");' /></td>"; echo "\n\t\t<td><input type='text' name='timeout[]' id='timeout" . $ctr . "' onkeypress='return handleEnter(event,\"inqty" . $ctr . "\");' /></td>"; echo "\n\t\t<td><input type='text' name='inqty[]' id='inqty" . $ctr . "' onkeypress='return handleEnter(event,\"outqty" . $ctr . "\");' /></td>"; echo "\n\t\t<td>" . $row["input_unit"]; echo "<input type='hidden' name='iun[]' value='" . $row["input_unit"] . "' /></td>"; echo "\n\t\t<td><input type='text' name='outqty[]' id='outqty" . $ctr . "' onkeypress='return handleEnter(event,\"idno" . $ctr . "\");' /></td>"; echo "\n\t\t<td>" . $row["output_unit"]; echo "<input type='hidden' name='oun[]' value='" . $row["output_unit"] . "'></td>"; echo "\n\t\t<td><input type='text' name='idno[]' id='idno" . $ctr . "' onkeypress='return handleEnter(event,\"mcno" . $ctr . "\");' /></td>"; echo "\n\t\t<td><input type='text' name='mcno[]' id='mcno" . $ctr . "' onkeypress='return handleEnter(event,\"varqty" . $ctr . "\");' /></td>"; echo "\n\t\t<td><input type='text' name='varsublot[]' id='varsublot" . $ctr . "' onkeypress='return handleEnter(event,\"dateshift" . $ctr . "\");' /></td>"; echo "\n\t\t<td><input type='text' name='dateshift[]' id='dateshift" . $ctr . "' onkeypress='return handleEnter(event,\"shift" . $ctr . "\");' /></td>"; echo "\n\t\t<td><input type='text' name='shift[]' id='shift" . $ctr . "' onkeypress='return handleEnter(event,\"timein" . $tctr . "\");' /></td>"; echo "\n\t</tr>"; } if($totalrows > 1); { $row = mysql_fetch_array($result); echo "\n\t<tr>"; echo "\n\t\t<td>"; if ($last_operation_name != $row["operation_name"]) echo $row["operation_name"]; $last_operation_name = $row["operation_name"]; echo "<input type='hidden' name='opname[]' value='" . $row["operation_name"] . "' /></td>"; echo "<input type='hidden' name='opname[]' value='" . $row["operation_name"] . "' /></td>"; echo "\n\t\t<td><input type='text' name='timein[]' id='timein" . $ctr . "' onkeypress='return handleEnter(event,\"timeout" . $ctr . "\");' /></td>"; echo "\n\t\t<td><input type='text' name='timeout[]' id='timeout" . $ctr . "' onkeypress='return handleEnter(event,\"inqty" . $ctr . "\");' /></td>"; echo "\n\t\t<td><input type='text' name='inqty[]' id='inqty" . $ctr . "' onkeypress='return handleEnter(event,\"outqty" . $ctr . "\");' /></td>"; echo "\n\t\t<td>" . $row["input_unit"]; echo "<input type='hidden' name='iun[]' value='" . $row["input_unit"] . "' /></td>"; echo "\n\t\t<td><input type='text' name='outqty[]' id='outqty" . $ctr . "' onkeypress='return handleEnter(event,\"idno" . $ctr . "\");' /></td>"; echo "\n\t\t<td>" . $row["output_unit"]; echo "<input type='hidden' name='oun[]' value='" . $row["output_unit"] . "'></td>"; echo "\n\t\t<td><input type='text' name='idno[]' id='idno" . $ctr . "' onkeypress='return handleEnter(event,\"mcno" . $ctr . "\");' /></td>"; echo "\n\t\t<td><input type='text' name='mcno[]' id='mcno" . $ctr . "' onkeypress='return handleEnter(event,\"varqty" . $ctr . "\");' /></td>"; echo "\n\t\t<td><input type='text' name='varqty[]' id='varqty" . $ctr . "' onkeypress='return handleEnter(event,\"varsublot" . $ctr . "\");' /></td>"; echo "\n\t\t<td><input type='text' name='varsublot[]' id='varsublot" . $ctr . "' onkeypress='return handleEnter(event,\"dateshift" . $ctr . "\");' /></td>"; echo "\n\t\t<td><input type='text' name='dateshift[]' id='dateshift" . $ctr . "' onkeypress='return handleEnter(event,\"shift" . $ctr . "\");' /></td>"; echo "\n\t\t<td><input type='text' name='shift[]' id='shift" . $ctr . "' onkeypress='return handleEnter(event,\"saveform\");' /></td>"; echo "\n\t</tr>"; } echo "</table>"; } echo "<p><input type='submit' value=' Save ' id='saveform' /></p>"; echo "<input type='hidden' name='typeno' value='" . $_POST["typeno"] . "' />"; ?> </form> </body> </html>

I got an error in line 30

What was the error displayed?

Quote:

Originally Posted by Nile

What was the error displayed?

here is the error
Line: 31
Error: 'document.getElementById(...)' is null or not an object