Useful Website links
Perl
Orelly books on Perl, Java, Oracle and many more
http://www.unix.org.ua/orelly/
Ajax
IBM Developer Works Go to http://www-128.ibm.com/developerworks/views/web/libraryview.jsp
Search for 'Mastering Ajax'.
Dojo -- www.dojotoolkit.org/
Miscellaneous
Check the below url for more links