[users@httpd] rewrite/redirect help

[K R]

Hi all,

i have a need to  do the below req on the apache
http://website/index?doc=line&ptr=####&root=HLD
->
http://website/index?doc=line&ptr=####

here ####  is a dynamic variable  e.g S1234 , S01234,P10338

appreciate any help

thanks in advance.