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05.15.2008 at 06:24PM PDT, ID: 23407206
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9.4

How to calculate total onblur from array of  input fields in a form

Asked by betagirl in JavaScript, Scripting Languages, Web Development

Tags:

Hi -

I've got a form that dynamically generates input fields, based on 'n' records in the db related to an id that is passed to the form page (so the number of inputs may vary each time the form is loaded).

The user will input a number into field  'amount[]' and I need 2 fields lower on the form to update automatically based on the user input.

Field 'total' will calculate the total amount, based on what's been entered in 'amount[]' and the field 'available' will calculate the available amount, based on subtracting the number in the 'grand total' field - which is hard coded (passed into the form upon page load).  

So I need a script that will get the values entered in the 'amount[]' fields and update the 'total' field with the sum of those.

Then I need to subtract the 'total' value that gets generated, from the 'grand total' value (variable passed in) to come up with the proper remaining amount, for the 'available' field.  

All before the form is submitted.  Now, with hard coded values, I can do this using functions like the ones here: http://www.experts-exchange.com/Programming/Languages/Scripting/JavaScript/Q_23094948.html.

I'm having a hard time adapting that code to work with an array of inputs however.

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[+][-]05.15.2008 at 09:38PM PDT, ID: 21580041

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[+][-]05.16.2008 at 05:27AM PDT, ID: 21582049

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[+][-]05.17.2008 at 03:58PM PDT, ID: 21591020

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[+][-]05.20.2008 at 12:07AM PDT, ID: 21604033

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[+][-]05.20.2008 at 10:32AM PDT, ID: 21608359

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[+][-]07.06.2008 at 08:06PM PDT, ID: 21942565

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[+][-]07.06.2008 at 08:42PM PDT, ID: 21942650

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[+][-]07.07.2008 at 01:43AM PDT, ID: 21943421

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[+][-]07.07.2008 at 01:49AM PDT, ID: 21943449

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[+][-]07.07.2008 at 02:32AM PDT, ID: 21943605

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[+][-]07.07.2008 at 02:37AM PDT, ID: 21943621

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About this solution

Zones: JavaScript, Scripting Languages, Web Development
Tags: Javascript, PHP
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Solution Provided By: mplungjan
Participating Experts: 2
Solution Grade: A
 
 
[+][-]07.07.2008 at 02:54AM PDT, ID: 21943672

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[+][-]07.07.2008 at 02:54AM PDT, ID: 21943673

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