Thank you stephen.. Is this good enough to start... Actually I want to make my odoo CMS to communicate with odoo ERP.... for this do you have any links..

You want to develop a module. There are many modules that do this you can review the code to get ideas from them. I don't know what you want to do but maybe the simplest module to start with would be Contact forms: https://www.odoo.com/apps/modules/8.0/website_crm That allows you to build a form on the website and put the data into the contacts database. There are others like: live chat, recruitment, blogs, forum, jobs, online events, etc.

You can look at the module's source code online at: https://github.com/odoo/odoo/tree/8.0/addons/website_crm

its good...stephen odoo cms is great.. but I need some docs or links to create a new module for website.... it seems different from ordinary module creation.. so some help is needed.. please...