SRS(Software Rquirement Specification) document will 
describe about what the client is expecting from the 
system/application/project/product. It consists of real 
time usage of the system.
Ex: If you take Yahoo site, first page should be login, to 
access mailbox user should be authenticated, user can able 
to see all his received mails, user can send mails to 
reciipents etc......

FRS(Functional Requirements Specification) document will 
describe how the above requirements will be developed. In 
FRS, the functionality in SRS will written down in more 
technical terms. So to develop this system, what 
technologies should be used, to login what inputs shoule be 
provided, In Inbox what are the fields should displayed, 
how the user composes the mail etc......

Hi dear,
SRS:(Software/System Requirement Specification)
System Requirement Specification in which PM/PL collect the 
information of requirements which will be needed for the 
development of Application.
SRS Prepared by the devs TL/PM/PL by taking inputs from BRD


FRS:(Functional Requirement Specification)
A document that describes in detail the characteristics of 
the product with regard to its.Functional Requirement 
Specification in which mentioned all the details of System 
functionality.How system works.All the conditions and 
Validation as well as process are mentioned in FRS.

Thanks
Amol Bawane.