Automatic download of information from a particular website

We need a program that can automatically download dividend information from [login to view URL] When a specified date range is given, the program automatically checks each date in the date range, and handles returned stock dividend information returned by javascripts, and eventually compiles all data to a csv file Input: a date range (for example, 01/01/2009-01/01/2011) Output: a csv file that contains stock dividend information. The columns of the output csv files are: Symbol, Company, Amount, Yield, Dividend ExDate. Project requirement: 1) We perfer to python or perl, but are open to any other programming language to implement this project 2) Programmers need to be familar with html and javascript parsing in the language chosen