Calculated Field

It's hard to tell what exactly might be wrong. My advice is to see if there are any Javascript errors there.

This article can help:

http://xlinesoft.com/blog/2012/05/22/how-to-troubleshoot-javascript-errors/

Thank you for your fast reply!

So in the same add page can I put two code to calculate more than one field?

What i should put to separate the two codes: the one that calcualtes the QUANTITY and the second that calculate the AMOUNT
like what is following:
var ctrlPacking = Runner.getControl(pageid, 'Packing');

var ctrlQuantity = Runner.getControl(pageid, 'Quantity');
function func() {

ctrlQuantity.setValue(Number(ctrlCtn.getValue()) Number(ctrlPacking.getValue()));

}
ctrlCtn.on('keyup', func);

ctrlPacking.on('keyup', func);
// Should put a code or a sign beofre or after this?

// did i forget any part of the code?
var ctrlQuantity = Runner.getControl(pageid, 'Quantity');

var ctrlUnitprice = Runner.getControl(pageid, 'UnitPrice');

var ctrlAmount = Runner.getControl(pageid, 'Amount');
function func() {

ctrlAmount.setValue(Number(ctrlQuantity.getValue()) Number(ctrlUnitprice.getValue()));

}
ctrlQuantity.on('keyup', func);

ctrlUnitprice.on('keyup', func);

Yes, you can perform multiple calculations. You can either put all calculation code into the same function func() or create a new function named func2() that perform another set of calculations. Having two functions named "func" is definitely not going to work.