Changing BPF through javascript

Hi 

i found below code on MSDN, please help how to use this. or very helpful if i get any other alternate.. thanks

//A namespace defined for SDK sample code
//You should define a unique namespace for your libraries
var Sdk = window.Sdk || { __namespace: true };
(function () {
 //A global variable to store information about enabled business processes after they are retrieved asynchronously
 this.enabledProcesses = [];

 // A function to log messages while debugging only
 this.writeToConsole = function (message) {
  if (typeof console != 'undefined')
  { console.log(message); }
 };

 //Code to run in the OnLoad event
 this.formOnLoad = function () {
  //Retrieve Enabled processes
  Xrm.Page.data.process.getEnabledProcesses(function (processes) {
   //Move processes to the global Sdk.enabledProcesses array;
   for (var processId in processes) {
    Sdk.enabledProcesses.push({ id: processId, name: processes[processId] })
   }
   Sdk.writeToConsole("Enabled business processes flows retrieved and added to Sdk.enabledProcesses array.");

   //Write the values of the Sdk.enabledProcesses array to the console
   if (Sdk.enabledProcesses.length < 0) {
    Sdk.writeToConsole("There are no enabled business process flows for this entity.");
   }
   else {
    Sdk.writeToConsole("These are the enabled business process flows for this entity:");
    for (var i = 0; i < Sdk.enabledProcesses.length; i++) {
     var enabledProcess = Sdk.enabledProcesses[i];
     Sdk.writeToConsole("id: " + enabledProcess.id + " name: " + enabledProcess.name)
    }
   }

   //Any code that depends on the Sdk.enabledProcesses array needs to be initiated here

  });
 };

}).call(Sdk);