In Progress

calculation within a form

I have within a form the following:

<input name="txgain" type="text" size="10" />

and elsewhere in the same form:

<input name="losses" type="text" size="10" />

and a third entry:

<input name="powerout" type="text" size="10" />

What I want to do is bring up a message either pop-up or within the page when the applicant puts in a value in the third box, namely the results of the following calculation:

poweroutdbw=10*log10(powerout);

ERPcalc=poweroutdbw-losses+txgain;

The pop-up message will display ERPcalc rounded to 1 decimal place, and the applicant can either carry on if this is okay, or go back and amend one or more of the three offending fields and get an updated calculation.

All that to happen BEFORE submit is pressed and without affecting other fields that may or may not have been populated in the form.

Alternatively have a button to press within the form to carry out this calculation without affecting the other fields or eventual submit.

I am open to suggestions as to how best to have this facility created.

This is a formmail script which already works.

I am at the stage of adding extra features but need expertise which is beyond my present capability.

Form submission populates a mysql table also sends an email with the form details. All that is working currently.

Skills: AJAX, HTML, MySQL, PHP, Website Design

See more: within my capability, three form, php pop form, extra input text, form input, calculation php form, form submission mysql php, form details, design calculation, mysql php form entry, display extra fields, best submission script, php mysql script calculation, php mysql calculation script, expertise fields, pop display box design, form table design php, pop display design, php rounded, form box design, amend php, pop box design, php calculation script, features design table, form results email

About the Employer:
( 15 reviews ) Hamilton, United Kingdom

Project ID: #2563774

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callumbwhyte

I can do this right now for you! Please check the message I have sent you.

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toinnisfree

quick pro help. ftp and escrow required.

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denisCh

Please check PM

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AndreiMk

I have created your calculator. Please, see my PM.

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santoshfree

i can help in this.

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thangtqvn

Ready to to do it for you now.

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froiden07

I can do this. Check PMB for details

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AdamsK

Ready for service sir, thanks.

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Robbani

Thank you.

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webedict

HELLO SIR, LETS START AND FINISH IT ASAP. I HAVE 4 YEARS OF EXPERIENCE IN php, mysql, ajax, javascript, xhtml. THANKS !!

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Butterfly718

Hello,sir. I can help you. Let's start.

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lokjaiswal12

Hello, I will do it for you.

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ronakkumarpatel7

You will NOT find a better Web Developer than me. Guaranteed.

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larsjedinski

I am German, living in Bangkok.

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esafeguard

Ready to start. Regards.

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stevecorsi

Experienced developer and designer here ! Ready to start

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Kashif927

Please check your inbox for detail...

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imfsolution

HI Sir! Please read PM. Thanks!

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gabix89

I'm interested in this project and I can start immediately! PM sent with details, please check it!

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chocochaos

I have PMed you a working solution for this =)

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geetasaharkar

Hi, I read your project requirement thoroughly and I'm very interested. I'm ready to start. I am having 4 yrs of experience on CodeIgniter framework along with jQuery, AJAX, JSON for interactive sites. Please check PMB More

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