Javascript is client-side script and cannot be used to 'touch' the client side harddisk, for security reason.

My question:
1) Do you think that Javascript can be used to retrieve data from a database, like Access? If yes, how? Any reference?

2) Can we use Javascript to insert/delete/update data into/from a database (Access, for example)?

3) For PHP, we can download help file in .chm format, BUT for Javascript, wehere can I have its help file?

Thanks in advance.