Creating Conditional Calculation Script

[JRM_Amy]

Hello.  I'm going to preface my question by admitting up front that I have *zero* knowledge of JavaScript and I have spent the morning searching the web and this forum for answers to my questions but nothing has worked so far.

I'm trying to create a form for my leasing agent (who somehow manages to corrupt my Excel spreadsheet despite password protection AND locked cells) for his leasing commissions.  I have a drop down field called "DealType" where he can choose the options "New Lease / New Tenant", "New Lease / Existing Tenant" or "Lease or Option Renewal".  He then goes along and enters the rent components, which I have subtotaling into a read-only field called "TotalRent".

I want to create a read-only field called "CommissionDue" which would read something like this in Excel-speak:

If DealType="Lease or Option Renewal",TotalRent*50%,TotalRent

Using articles from Thom Parker, I put this script together:

event.value = "";

var a = +this.getField("DealType").value;

var b = +this.getField("TotalRent").value;

if (a="Lease or Option Renewal") event.value = b * 0.50;

else event.value = b;

However it is always putting the value in "CommissionDue" as 50% of the total rent, no matter what I pick for the deal type.

I would appreciate any help in getting over this last hurdle and making the calculation work properly.  Thank you!

[Bernd Alheit]

To compare the value of variable a use == not =

[JRM_Amy]

I assume you mean change the if line to  if (a=="Lease or Option Renewal") event.value = b * 0.50; else event.value = b;

That creates the opposite result; everything defaults to the full rent.

[Bernd Alheit]

You can display the value in the console:

console.show();console.println(a);

[JRM_Amy]

As I stated at the beginning, I have zero knowledge of JavaScript so I really do not understand what you are trying to say.  While I appreciate the help I need the "dummies" version.

[Bernd Alheit · Accepted solution]

You can add the lines to your code:

event.value = "";

var a = this.getField("DealType").value;

var b = +this.getField("TotalRent").value;

if (a == "Lease or Option Renewal") event.value = b * 0.50;

else event.value = b;

console.show();

console.println("a: '" + a + "'");