Find and replace in richtext field

Hi all,

here i want to find and replace the string in the richtext field, i know using richtext range we can replace all the occurences, but here my problem is here my search string is http://intra564.vertex.com and i want to replace it to http://inrta344.vertex.com here i want to search with search string if its found again i want to seach that entire path whether it is containing any .nsf in the path. here this some what irritating me from last two days please help me in this regard

Subject: find and replace in richtext field

Are u using Script or Formula ? Post yr code here?

Raj