[SalesForce] Invalid or unexpected token error in custom button DocuSign

What is wrong with this javascript code, I have copy the code from DocuSign website and added to my custom button, I could not able to figured out what is the cause of this error, anybody?

Follow error:

Copy the code from docuSign guide here

{!REQUIRESCRIPT("/apex/dsfs__DocuSign_JavaScript")}


//********* Option Declarations (Do not modify )*********//
var RC = '';var RSL='';var RSRO='';var RROS='';var CCRM='';var CCTM='';var CCNM='';var CRCL=''; var CRL='';var OCO='';var DST='';var LA='';var CEM='';var CES='';var STB='';var SSB='';var SES='';var SEM='';var SRS='';var SCS ='';var RES='';
//*************************************************//

// Modify individual options here:


// Related Content (default no related content)
RC = ''; //Ex: GetRelContentIDs("{!Opportunity.Id}"); 
// Recipient Signer Limit (default no limit)
RSL = ''; //Ex: '3'
// Recipient Starting Routing Order (default 1)
RSRO = ''; // Ex: '1'
// Recipient Routing Order Sequential (default not sequential)
RROS = ''; //Ex: '1' 
// Custom Contact Role Map (default config role)
CCRM = ''; //Ex: 'Decision Maker~Signer1; Economic Buyer~Carbon Copy'
// Custom Contact Type Map (default Signer)
CCTM = ''; //Ex: 'Decision Maker~Signer; Economic Buyer~Carbon Copy'
// Custom Contact Note Map (default no note)
CCNM = ''; //Ex: 'Decision Maker~Note for DM; Economic Buyer~Note For EB; DEFAULT_NOTE~Default Note'
// Custom Related Contact List (default object contact)
CRCL = ''; //Ex: 'MyContacts__r,Email~Email__c; FirstName~First_Name__c; LastName~Last_Name__c; Role~Role__c,LoadDefaultContacts~0'

// Custom Recipient List (Individual)
CRL = ''; //Ex: 'Email~;FirstName~; LastName~; Role~SignInPersonName~; RoutingOrder~; AccessCode~; RecipientNote~; SignNow~, LoadDefaultContacts~1'
// Custom Recipient List (Signing Groups)
CRL = ''; //Ex: 'SigningGroup~; Role~; AccessCode~; RecipientNote~; RoutingOrder~, LoadDefaultContacts~1'
OCO = ''; //Required with signing groups
// One Click Option (default edit envelope screen)
OCO = ''; //Ex: Tag (or Send)
// DocuSign Template ID (default no template)
DST = ''; //Ex: '67870A79-A0B5-4596-8AC1-CC7CC1EA01EB'
// Load Attachments (default on)
LA = ''; //Ex: '0'
// Custom Email Message (default in config)
CEM = ''; //Ex: 'Envelope sent by [FirstName] [LastName] ([Email])!'
// Custom Email Subject (default in config)
CES = ''; //Ex: 'Re: Opportunity Name: {!Opportunity.Name}'
// Show Tag Button (default in config)
STB = ''; //Ex: '1'
// Show Send Button (default in config)
SSB = ''; //Ex: '1' 
// Show Email Subject (default in config)
SES = ''; //Ex: '1' 
// Show Email Message (default in config)
SEM = ''; //Ex: '1' 
// Show Reminder/Expire (default in config)
SRS = ''; //Ex: '1' 
// Show Chatter (default in config)
SCS = ''; //Ex: '1'
// Reminder and Expiration Settings
RES = ''; //Ex: '0,1,2,0,120,3'

//********* Page Callout (Do not modify) *********//
window.location.href = 
"/apex/dsfs__DocuSign_CreateEnvelope?DSEID=0
&SourceID={!Opportunity.Id}&RC="+RC+"&RSL="+RSL+"&RSRO="+RSRO+"&RROS="+RROS+"
&CCRM="+CCRM+"&CCTM="+CCTM+"&CRCL="+CRCL+"&CRL="+CRL+"&OCO="+OCO+"
&DST="+DST+"&CCNM="+CCNM+"&LA="+LA+"&CEM="+CEM+"&CES="+CES+"
&SRS="+SRS+"&STB="+STB+"&SSB="+SSB+"&SES="+SES+"&SEM="+SEM+"
&SRS="+SRS+"&SCS="+SCS+"&RES="+RES;
//*******************************************//