How to SAVE the file

Hi All,

10  indesign files (i.e., Untitled-1, Untitled-2, Untitled-3,...............Untitled-10) are open at the same time.

Requirement:

Close all the files at the same time and save all the files with their proper naming like Untitled-1, Untitled-2 etc... in some location in my Desktop.

Lines i am tried from scripting guide are below:

for(i=app.documents.length; i>0; i--)

{

    app.documents.item(i-1).save(File("~/Desktop/"".indd"))

    }

I think where i highlighted bold that one is problem.

Kindly check and give the solution for me.

Let me know in case of further clarification.

Thanks in advance

BEGINNER