[Help-bash] variable assign preceding script

[Wu Shuangrong]

Hello,

I have a script and now i want to change the environment variable IFS to null 
value for all of the commands contained within the script, so will the 
following form of calling script work?

$> IFS= myscript arg1 arg2 arg3

Will IFS changing just affect the first command in the script file? If this is 
the case, how should I do to achieve my goal?

Thanks everyone very much.
Shuangrong