Hi I have five menu items " Home, About us, Archives, Services, Contact us" they all comes from mod_mainmenu modules and on Archives i need to put onclick event how can i do that? Is it possible or not?
As the above poster said, it is not good practice to hack core files. However, take a look into Template Overrides and you can copy the referenced php document into the template's html directory, which will override the core component. In this way, the core component can still be updated when you update/upgrade Joomla, and your override file will take precedence.