How to use SetUserId function


I am new to Piwik an i want to set the userid through the setuserid when the button click event is triggered , But the Userid is not getting set . please help .


Did you already read documentation about user-id?

how to pass user id through setuser id function? When i used the same format as that of what is given in documentation,my page is not recordered.


How exactly are you using the function?
When it is not working, do you get an error in the javascript console of your browser?

Should i need to implement userid code in the login page alone or in all pages?