saving a word document opened in the browser on server

[vaishali dalvi]

hi
I have to downloaded a word document from the server with the following javascript code
function openpage(f)
{
doc=open(f,"output","status,menubar=no,toolbar=no");
}
f is a string variable which i get in jsp after querying a database.
Can i use that variable in javascript to download that particular file f.further i also want to save the changed document on the server.How do i do it?
please help