[thelist] Numbers Just Don't Add Up

Sarah Adams mr.sanders at geekjock.ca
Thu Jan 18 07:32:14 CST 2007

> I was able to fix my problem with:
> invoiceTotal = eval(invoiceSubtotal) + eval(invoiceShipping) +
> eval(invoiceCOD)

You should try to avoid using the eval() function unless it absolutely
can't be helped. I'd go with Lee's suggestion of casting to ensure that
your variables get treated as numbers. Or if you want something dead
simple (but slightly hackish), try something like this:

invoiceTotal = 1* invoiceSubtotal + invoiceShipping + invoiceCOD

The "1*" tells javascript that you're working with numbers, not
concatenating strings.

sarah adams
web developer & programmer
portfolio: http://sarah.designshift.com
blog: http://hardedge.ca

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