GCOOK1
asked on
Need javascript help calculating subtotals on a form
I need some help with javascript. My script is below. I have the extended cost fields working properly. How do I write the javascript to automatically calculate and display the subtotal?
<html>
<head>
<SCRIPT language="Javascript">
function handleEnter (field, event) {
var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
if (keyCode == 13) {
var i;
for (i = 0; i < field.form.elements.length
if (field == field.form.elements[i])
break;
i = (i + 1) % field.form.elements.length
field.form.elements[i].foc
return false;
}
else
return true;
}
function calculate(index){
var formObject = document.forms[0];
var quantity = formObject.elements['r'+in
var price = formObject.elements['r'+in
if(quantity > 0 && price > 0){
formObject.elements['r'+in
}
}
</script>
</head>
<body>
<form name="MyForm">
<table cellpadding="0" border="0" ID="Table1">
<tr>
<td>ITEM</td>
<td>QUANTITY</td>
<td>COST</td>
<td>EXTENDED COST</td>
</TR>
<TR>
<td><p>Line 1</td>
<td><input type="text" size="5" id="r1c1" name="r1c1" onchange="calculate(1)" onkeypress="return handleEnter(this, event)"></td>
<td><input type="text" size="5" id="r1c2" name="r1c2" onchange="calculate(1)" onkeypress="return handleEnter(this, event)"></td>
<td><input type="text" size="5" id="r1c3" name="r1c3" onkeypress="return handleEnter(this, event)"></td>
</TR>
<TR>
<td><p>Line 2</td>
<td><input type="text" size="5" id="r2c1" name="r2c1" onchange="calculate(2)" onkeypress="return handleEnter(this, event)"></td>
<td><input type="text" size="5" id="r2c2" name="r2c2" onchange="calculate(2)" onkeypress="return handleEnter(this, event)"></td>
<td><input type="text" size="5" id="r2c3" name="r2c3" onkeypress="return handleEnter(this, event)"></td>
</TR>
<tr>
<td>Subtotal</td>
<td></td>
<td></td>
<td><input type="text" size="5" id=subtot name=subtot></td>
</tr>
</table>
</form>
</body>
</html>
<html>
<head>
<SCRIPT language="Javascript">
function handleEnter (field, event) {
var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
if (keyCode == 13) {
var i;
for (i = 0; i < field.form.elements.length
if (field == field.form.elements[i])
break;
i = (i + 1) % field.form.elements.length
field.form.elements[i].foc
return false;
}
else
return true;
}
function calculate(index){
var formObject = document.forms[0];
var quantity = formObject.elements['r'+in
var price = formObject.elements['r'+in
if(quantity > 0 && price > 0){
formObject.elements['r'+in
}
}
</script>
</head>
<body>
<form name="MyForm">
<table cellpadding="0" border="0" ID="Table1">
<tr>
<td>ITEM</td>
<td>QUANTITY</td>
<td>COST</td>
<td>EXTENDED COST</td>
</TR>
<TR>
<td><p>Line 1</td>
<td><input type="text" size="5" id="r1c1" name="r1c1" onchange="calculate(1)" onkeypress="return handleEnter(this, event)"></td>
<td><input type="text" size="5" id="r1c2" name="r1c2" onchange="calculate(1)" onkeypress="return handleEnter(this, event)"></td>
<td><input type="text" size="5" id="r1c3" name="r1c3" onkeypress="return handleEnter(this, event)"></td>
</TR>
<TR>
<td><p>Line 2</td>
<td><input type="text" size="5" id="r2c1" name="r2c1" onchange="calculate(2)" onkeypress="return handleEnter(this, event)"></td>
<td><input type="text" size="5" id="r2c2" name="r2c2" onchange="calculate(2)" onkeypress="return handleEnter(this, event)"></td>
<td><input type="text" size="5" id="r2c3" name="r2c3" onkeypress="return handleEnter(this, event)"></td>
</TR>
<tr>
<td>Subtotal</td>
<td></td>
<td></td>
<td><input type="text" size="5" id=subtot name=subtot></td>
</tr>
</table>
</form>
</body>
</html>
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.