how to add this kind of warning sign in my forum?

[Mercenary540]

http://www.intporn.com/forums/xxx-full-movies/2568842-interracial-black-latin-xxx-full-movies.html
"This website contains sexually explicit material. You must be 18 years of age or older to proceed."

 

[inject0r]

I bet theres a plugin for a popup like this for vB

 

[Mercenary540]

and how about wordpress?

 

[Apathetic]

http://www.thesimplexdesign.com/2011/02/using-jquery-to-make-one-time.html

 

[Mercenary540]

nice tutorial but how can i put those code on my wordpress and vb?

 

[traxport121]

how about using a plugin for wordpress?
http://wordpress.org/extend/plugins/content-warning/