creating squid block page banner
 

i have setup squid v3 in centos and working well , therafter i want to make and apply squid own created block banner page ...
plese let me know is it possible, if it is also let me know hot to creat

Start by looking through the squid documentation.
http://www.squid-cache.org/Doc/config/

...and Google has MANY documents that tell you how to do this. Look in your squid.conf file (usually in /etc/squid/squid.conf), and find the error_directory parameter. That's the place where your error/block pages are kept for different errors. Modify the default pages as you see fit, or change the parameter to point to some other directory of yours, where you will have pages of the same names.