{!REQUIRESCRIPT("/soap/ajax/29.0/connection.js")} 

var myQuery = "SELECT  Application_Entitlement_ID__c  FROM Account WHERE Id = '{!Opportunity.AccountId}' limit 1";
result = sforce.connection.query(myQuery); 
records = result.getArray("records"); 

var roleName = "CaseRole",
var qr = sforce.connection.query("SELECT Id, Name FROM CaseTeamRole where rolename + "Requestor");
var crRecords = qr.getArray("records");
var rec = crRecords[0];

if(records[0]){ 
var relatedAccount = records[0]; 
try{ 
    var recToCreate = new sforce.SObject("Case");
    
    // select Case Record Type
    var recordTypeQuery = sforce.connection.query("SELECT Name,Id from RecordType where developername = 'WE_Application'");
    var recordTypeQueryResult = recordTypeQuery.getArray("records");
    recToCreate.RecordTypeId = recordTypeQueryResult[0].Id;

    // select Queue as owner 
    var queueNameQuery = sforce.connection.query("SELECT Queue.DeveloperName, QueueId from QueueSobject where Queue.DeveloperName = 'Wex_Europe_Customer_Services'");
    var queueNameQueryResult = queueNameQuery.getArray("records");
    recToCreate.OwnerId = queueNameQueryResult[0].QueueId;
 
    recToCreate.AccountId = '{!Opportunity.AccountId}';  
    recToCreate.Subject = '{!Opportunity.Name}';  
    recToCreate.Origin = "Customer Application";
    recToCreate.Opportunity__c = '{!Opportunity.Id}';
    recToCreate.User__c = '{!Opportunity.OwnerId}';

    // select Entitlement from Account field
    recToCreate.EntitlementId = relatedAccount.Application_Entitlement_ID__c;

    var result = sforce.connection.create([recToCreate]);

    // add business requestor to Case Team Role
    var ct = new sforce.SObject("CaseTeamMember");
    ct.MemberId = "{!$User.Id}";
    ct.parentId= result[0].Id;
    ct.TeamRoleID =rec.Id;
    alert('Logged In User:'+ct.MemberId);
    alert('Case ID:'+ct.parentId);
    alert('TeamRoleID:'+ct.TeamRoleID);

    var result = sforce.connection.create([ct]);
    alert('Successfully Added to Case Team');

    // check that Case has been created
    if(result[0].success == "true"){
        location.reload();
    }
    else{
        alert("An Error has Occurred. Error:" + result[0].errors.message);
    }
}
catch(e){
    alert("An Error has Occurred. Error:" + e);
}

}

{!REQUIRESCRIPT("/soap/ajax/29.0/connection.js")} 

var myQuery = "SELECT  Application_Entitlement_ID__c  FROM Account WHERE Id = '{!Opportunity.AccountId}' limit 1";
result = sforce.connection.query(myQuery); 
records = result.getArray("records"); 

var roleName = "CaseRole",
var qr = sforce.connection.query("SELECT Id, Name FROM CaseTeamRole where rolename + "Requestor");
var crRecords = qr.getArray("records");
var rec = crRecords[0];

if(records[0]){ 
var relatedAccount = records[0]; 
try{ 
    var recToCreate = new sforce.SObject("Case");
    
    // select Case Record Type
    var recordTypeQuery = sforce.connection.query("SELECT Name,Id from RecordType where developername = 'WE_Application'");
    var recordTypeQueryResult = recordTypeQuery.getArray("records");
    recToCreate.RecordTypeId = recordTypeQueryResult[0].Id;

    // select Queue as owner 
    var queueNameQuery = sforce.connection.query("SELECT Queue.DeveloperName, QueueId from QueueSobject where Queue.DeveloperName = 'Wex_Europe_Customer_Services'");
    var queueNameQueryResult = queueNameQuery.getArray("records");
    recToCreate.OwnerId = queueNameQueryResult[0].QueueId;
 
    recToCreate.AccountId = '{!Opportunity.AccountId}';  
    recToCreate.Subject = '{!Opportunity.Name}';  
    recToCreate.Origin = "Customer Application";
    recToCreate.Opportunity__c = '{!Opportunity.Id}';
    recToCreate.User__c = '{!Opportunity.OwnerId}';

    // select Entitlement from Account field
    recToCreate.EntitlementId = relatedAccount.Application_Entitlement_ID__c;

    var result = sforce.connection.create([recToCreate]);

    // add business requestor to Case Team Role
    var ct = new sforce.SObject("CaseTeamMember");
    ct.MemberId = "{!$User.Id}";
    ct.parentId= result[0].id;
    ct.TeamRoleID =rec.Id;
    alert('Logged In User:'+ct.MemberId);
    alert('Case ID:'+ct.parentId);
    alert('TeamRoleID:'+ct.TeamRoleID);

    var result = sforce.connection.create([ct]);
    alert('Successfully Added to Case Team');

    // check that Case has been created
    if(result[0].success == "true"){
        location.reload();
    }
    else{
        alert("An Error has Occurred. Error:" + result[0].errors.message);
    }
}
catch(e){
    alert("An Error has Occurred. Error:" + e);
}

}