Thanks 4 the reply!!!

But my question was regarding the no.5 (the start location parameter)
my question was

no matter i enter 5 or i dont!!! the result it is giving is always 16 for the query that i wrote!!!

if i dont enter 5 it should start the search from the begining and if i enter 5 thre the earch should begin from the 5th character!!! right????