error in javascript function to update a price field

[PerrySmit]

I have added two fields filed into the products table named "products.pricemodifier" and "products.listprice"

 

Idea is to have some different calculation methods which I want show while user change the fields in the product edit layout, without the need of refeshing the window.

 

To start somewhere, I have added the following function into spiffCalv2_1.js like

 

function calculateprice(){

alert ("you have changed the price!!!")

}

 

and in the category.pho I have added the option'onChange="calculateprice()

 

So far so good, the alert will come up as soon I change the products.pricemodifier field.

 

Now I want set the products_price field based on the change you made in the products_pricemodifier field

.

To start simple, I suppose the function should sound like:

 

function calculateprice(){

this.products_price.value=123

}

 

But will not work...What goes wrong in my function?

 

Thanks for any help,

Perry

[Guest]

you need to pass the object to the function i.e.

 

'onChange="calculateprice( this )"

 

and the function

 

function calculateprice( myObject )

{

myObject.products_price.value=123;



}

[PerrySmit]

unfortunantly still no luck,

 

To summurize

The lines in

admin/categories.php

is

tep_draw_input_field('products_pricemodifier', $pInfo->products_pricemodifier,'onChange="calculateprice( this )"');

 

and in spiffycal.js I have

 

function calculateprice( myObject ){

myObject.products_price.value=123;

}

 

Maybe more to think off?

 

 

 

and the function

 

function calculateprice( myObject )

{

myObject.products_price.value=123;



}

[Guest]

you need the field name to be the same in the function as it is in the input box

 

i.e.

 

you have called the input field products_pricemodifier and then referred to it as products_price in the function.

 

They have to be the same.

 

I would suggest getting it working outside of oscommerce first - just make a quick form in ordinary html.

[Guest]

sorry I told you the wrong thing then ....

 

the function does not need the name as you are passing the object.

 

function calculateprice( myObject ){ 

myObject.value="123"; 

}

 

you just need to reference the value directly

[PerrySmit]

Thanks for your help,

 

though still can?t accomplish my wish.

 

I want up date an other field when a onChange is on products_pricemodifier.

 

So, how to pointer to an other field I want change...

 

 

 

 

sorry I told you the wrong thing then ....

 

the function does not need the name as you are passing the object.

 

function calculateprice( myObject ){ 

myObject.value="123"; 

}

 

you just need to reference the value directly

[Guest]

you should look at the javascript reference manual really.

 

But ...

 

if your form was called "example_form" and you had a field called field1 and another called field2

 

you can put the onchange in field1 and reference field2 with document.example_form.field2.value="123"

 

so you wouldnt need to pass the object in the function as you are referencing it directly.