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Looping Calculation

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Feb 07.2007

Hi there, I have the following function:

[code]
function calculate(cnum){
price=parseFloat(document.frm1.size1.value)+parseFloat(document.frm1.base1.value);
document.frm1.price1.value=”£”+formatNumber(price);
}
[/code]

I am looking for a way to replace size1, base1 and price1 with size+cnum, base+cnum, price+cnum;

That was I can call the function calculate(1) and it will check base1, price1 and size1. Then call calculate(2) to check base2, price2 and size2.

Any ideas?

Gaz.

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JavaScript

2 Comments(s) ↴

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@UltimaterFeb 07.2007 — <i>
</i>function calculate(cnum){
var price=parseFloat(document.frm1["size"+cnum].value)+parseFloat(document.frm1["base"+cnum].value);
document.frm1["price"+cnum].value="£"+formatNumber(price);
}
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@CrazyGazauthorFeb 07.2007 — Awesome, exactly what I needed. I remember using it before but couldn't for the life of me remember the syntax.

Cheers,

Gaz.

A follow up question:

I have the line

<i>
</i> topping=document.frm1.toppings1[document.frm1.toppings1.selectedIndex].text;


Is it possible to convert this too?

I have tried a couple of things such as:

<i>
</i> topping=document.frm1.[["toppings"+cnum][document.frm1.toppings1.selectedIndex]].text;


EDIT: I got it fixed.

<i>
</i> topping=document.frm1(["toppings"+cnum][document.frm1.toppings1.selectedIndex]).text;
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