Adding values of text boxes

[Wardy]

I have a coding problem that should be simple to do but I've just gone a blank at the moment.
I have 5 drop down menus and when a user selects a value from it it displays the cost in a text box. So I have 5 drop down menus with 5 text boxes (1 by each drop down).

Anyway, I'm using a javascript bit of code to work out what goes into each text box but I've come to making a "Total" that will be a text box with all the values from the 5 previous text boxes but my mind has gone blank on how to do it

Does this sum have to be done in javascript too or is there a simple PHP way to do it?

The text boxes are named total1, total2...etc

I hope this makes sence

Cheers
Wardy

[jonsp]

this.form.total1.value + this.form.total2.value .......
or
document.forms[0].total1.value + document.forms[0].total2.value...

You'd probably put this in a function and wire it up to onchange on the select.
<script>
function getTotal(f){
f.Total.value = f.total1.value + f.total2.value+f.total3.value + f.total4.value+f.total5.value;
}
</script>
<select onchange="getTotal(this.form);"



Jon

[matty]

that javascript is for working something out for displaying on the fly.

it can be done in PHP easily, but for that you need to actually communicate with the server by submitting the form values, so not so good if you just want something to automatically update when a field value changes.