Explain me this code

Question

var fields = xfa.layout.pageContent(xfa.layout.page(this)-1, "field", 0);
var total = 0;
for (var i=0; i <= fields.length-1; i++) {
if (fields.item(i).name == "PRICE") {
total = total + fields.item(i).rawValue;
this.rawValue = total;

Answer 1

Hi Ankesh,
Basically this code is calculating the SUM of the PRICE fields contained in the Previous Page.  Please see my comments in the code below:
//Get all fields contained in the Previous page (xfa.layout.page(this)-1   means previous page)
var fields = xfa.layout.pageContent(xfa.layout.page(this)-1, "field", 0);
var total = 0;
//Loop through all the fields
for (var i=0; i <= fields.length-1; i++) {
//If the field name is PRICE
if (fields.item(i).name == "PRICE") {
//Then add the value of the field to the Total
total = total + fields.item(i).rawValue;
//Set the calculated Total value in "this" field.  "This" field is referring to the field that is actually calling this code.
this.rawValue = total;
Hope this helps,
harman