Analytics Software

I need help writing some javascript code that needs to be called from Delivers to do the following....

- call an OBIEE report that returns a list of usernames - returning an XML file
- process XML and cycle through each user and passing as a parameter to execute another report
- turn the results of each users report into a csv or tab delimited file
- concatenate all files together and save on server

parm1 = report to get users (url)
parm2 = url for report that need to be run for each user
parm3 = location to save file on server

any tips would be helpful

thanks