multiple form field calculation

thenamenoonehastaken · #1 Feb 21st, 2008, 05:55

Hi guys,

I'm still very new to the world of javascript and I am trying to make a script that will calculate up to 10 form fields in 1 loop.

can anyone point me to a tutorial on adding multiple form fields or can provide me with a little snippet it would be greatly appreciated.

thanks

Rakuli · #2 Feb 21st, 2008, 09:00

To get 10 form fields a simply way of doing it is giving your form a unique id -- let's say id="theform"

You would then do this

Code: Select all

var formInputs = document.getElementById('theForm').getElementsByTagName('input');

// now loop through

var nm = formInputs.length; // get the number of inputs

var runningTotal = 0; // This will store the total in the inputs
for (i=0; i< nm; i++)
{
    runningTotal += formInputs[i].value;
}

document.write(runningTotal);

You can get a bit more specific with how you address the inputs but that is nice solid start.

CloudedVision · #3 Feb 21st, 2008, 22:32

i wouldn't rely on javascript..... i would go the server-side route and have PHP (or ASP or somethin) generate it.

Never use javascript if you don't have to.

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multiple form field calculation