Question Regarding Passing Values To Fields

Hi! I am able to implement my forms, but it seems very inefficient currently. I am using the Dropdown for the user to select a variety of values/choices to be calculated.

Currently, I have to use switch{}/case: clauses for the choice text switch(fieldname7|r) in each field. For example:

/* Calculate using the fields that appear via the user
   dropdown selection */
(function(){
var result;
switch(fieldname7|r)
{
case 'option1': result = 0.03003/fieldname14;
break;
case 'option2': result = 0.03003/fieldname36;
break;
case 'option3': result = 0.03003/fieldname39;
break;
}
return PREC(result*1000000,1);
})()

rather than simply:

1. Assigning values to variables based on the user dropdown choice.
2. Calculate in desired fields using those variables (as opposed to having to use switch(), case: based on the choice text/specific fields selected via the dropdown.

i.e.,:

(function(){
var result;
/* Calculate using the variables assigned values
   by the dropdown user selection */

   result = variable1/(pow(variable2,2)*variable3);

   return PREC(result*1000000,1);
})()

Is that possible? Can the dropdown also be associated with a function or code snippet to assign values to variables, etc?

Thank you! 🙂