while clicking the button the record template want to down load as salescontact no - customer name

while clicking the button the record template want to down load as salescontact no - customer name

 while clicking the button  the  record template want to down load as   salescontact no - customer name
 

Deluge Code Used :
account_name = input.Customers.Account_Name;
pdf = input.Sales_Contract1 + "-" + account_name.replaceall("[^a-zA-Z0-9]","_");
openUrl(zoho.appuri + "record-pdf/Sales_Contract_Repot/" + input.ID + "/" + pdf,"new window");

currenly down load format 

SC-001122-Tata_consultancy_Trading_LLC

I need the Format like This :

Example :

SC-001122-Tata consultancy Trading LLC

Pls help i can down load the record  template this like format