Where to submit own html, css, javascript tutorials?

Just start your own blog. If you write good tutorials people will find it eventually :)

http://sixrevisions.com is also a good place to write, they have over 65000 readers

But like litso said it's better to start your own blog so you have other things to show to interested readers. Then you can also promote them on tutorial site like pixel2life.com, tutorialized.com or cmstutorials.org.

Smashingmagazine.com is one of the best out there, and they have ridiculous traffic numbers to help boost your viewers in a hurry.