Dynamically Pass Structure

Hi Expert,

I have Differnt file for Different Structure/Internal Table ,

Now i want to Download this  Data in to File

File name is File1,file2,file3 file4....

Table name mara,makt,ekko,akpo,.......

i want if table is mara then use download FM for file1

if table is Makt then download to file2 ....

table name should be any with its structure ......

Thanks.