Move contents of one set of fields to another set of fields

Question

On my Opportunity object:

I have created six custom fields

• AVSFQB__Generate_Object__c
• AVSFQB__Quickbooks_Id__c
• AVSFQB__QuickBooks_ItemType__c
• Sample_Generate__c
• Sample_Quickbooks_ID__c
• Sample_QuickBooks_ItemType__c

I have also created a custom button Process_Sample_Sent

I would like to click the button and move the field contents:

• AVSFQB__Generate_Object__c to Sample_Generate__c
• AVSFQB__Quickbooks_Id__c to Sample_Quickbooks_ID__c
• AVSFQB__QuickBooks_ItemType__c to Sample_QuickBooks_ItemType__c

On the custom button, I have selected:

• Display type - Detail Page Button
• Behavior - Execute JavaScript

• Content Source - OnClick JavaScript

  {!Opportunity.Sample_Generate__c} =     {!Opportunity.AVSFQB__Generate_Object__c} 
  {!Opportunity.Sample_Quickbooks_ID__c} = {!Opportunity.AVSFQB__Quickbooks_Id__c} 
  {!Opportunity.Sample_QuickBooks_ItemType__c} = !Opportunity.AVSFQB__QuickBooks_ItemType__c}
  

This throws an "Unexpected token = " error

Here is my modified code that is throwing the same error.

{!REQUIRESCRIPT("/soap/ajax/29.0/connection.js")}
var record = new sforce.SObject("Opportunity__c");
    record.Id = ("Opportunity__c.Id");
    record.{!Opportunity.Sample_Generate__c} = {!Opportunity.AVSFQB__Generate_Object__c};
var result = sforce.connection.update([record]);
// check the result here
window.location.reload();

Thank you Ardian, Here is the code edited with your suggestion. It is throwing an "Unexpected Identifier" error

{!REQUIRESCRIPT("/soap/ajax/29.0/connection.js")} 
var record = new sforce.SObject("Opportunity__c"); 
record.Id = ("Opportunity__c.Id"); 
record.Sample_Generate__c = {!Opportunity.AVSFQB__Generate_Object__c}; 
var result = sforce.connection.update([record]); 
// check the result here 
window.location.reload();

ARGH.. I didn't mention, AVSFQB__Generate_Object__c is a PICKLIST and Sample_Generate__c is a TEXT field. I am trying to capture the PICKLIST value into the TEST field

Answer 1

The correct way to reference the field when setting them is record.Field_Token__c, not record.{!ObjectToken.Field_Token__c}.

Change:

record.{!Opportunity.Sample_Generate__c} = {!Opportunity.AVSFQB__Generate_Object__c};

to:

record.Sample_Generate__c = {!Opportunity.AVSFQB__Generate_Object__c};