Hi Experts,
We need to store value '0001' in VA01 as Storage Location for all line Items without enter manually! (I tried the following script button-But it's not working-I can see the value come and go from the SLoc area !)
NOTE : If we enter Sloc 0001 manually for the first line Item then It's possible to store and paste value for the other line items too -Thanks to Mr.Strev Rumsby for your idea! 
Advance Thanks to all,
Best Regards,
Dilak