summary field value change to 0 after the page fully loaded

[newminder]

I did these

a. created inventoryfields like pkgweight, pkgvolume, pkgty...
b. change database fields and invtype accordingly
b. add some codes into the inventory.js
now, it works, but when I edit the records, the sum field values change to 0 after the page fully loaded. as you can see at the begging, the datas show correct and then suddenly(page loaded 100%) change to 0.

any one knows how to check or how to solve.

[newminder]

no error showed up.

[newminder]

I Worte functions calculatexxxsummary() and triggered it under summaryCalculations(), now the customized files works fine but the system netprice grossprice summation does not work.....

crazy~~~~~~~~~

[newminder]

solved