Convert a number field to negative and then multiple by another field

[Guest]

Hello,

I'm new to using JavaScript (no training at all) and am trying to take a field that the user enters as a negative number and convert that number to a positive and then multiple by another field.

This is what I wrote, but it is not working correctly so I think it has to do with the order.

The first thing I'm trying to is to multiple by -1 to turn it to a positive number and then multiple by the other field.

event.value = this.getfield("*S7 Special Functions Costs").value *-1 * this.getfield ("S5Total Meals");

The first thing I'm trying to is to multiple the field "*S7 Special Functions Costs" by -1 to turn it to a positive number and then multiple by the other field "S5Total Meals".  I'm using the this.getfield because my field names have spaces and I used the '*' in my field names to denote fields that were used in other spots, which made sense when I started since its a multiple page Projected Operating Costs and that was before I started doing math in the form.

If any JavaScript expert can help I would appreciate it.

[try67]

You have a couple of errors there... Try this:

event.value = Number(this.getField("*S7 Special Functions Costs").value) * -1 * Number(this.getField("S5Total Meals").value);

[George_Johnson]

If there's any possibility of the user (accidentally?) entering a positive number, or nothing at all in either of the two input fields, you might want to add additional code to deal with that.

[try67]

If either field is empty the code I posted above will just result in zero.

[Guest]

So I have another issue that is messing with the JavaScript.  The Field ("S5Total Meals") is a sum of several fields one of which has decimal places.  I don't want it to use the decimals.  So I search and found what to use.  So can you tell me where in this Script I would add the .toFixed (0) so that the end result doesn't have decimal places.  

var nRate = this.getField("S5MealequivalentRate").value;

if(nRate !=0){event.value = this.getField("S5totalotherrev").value / nRate;} else {event.value = "";}

I think I might need extra "(" or ")" but again I'm learning as I go.  I tried adding it right after nRate but that took the decimal places from nRate which I don't want it to do.

I really appreciate the help

[Nesa Nurani]

Try like this:  (this.getField("S5totalotherrev").value / nRate).toFixed(0)