Create a Custom Control using Javascript

I've been trying to do some research into this, but I haven't yet found anything related to this, so I've come here in hop开发者_如何学运维es that someone might be able to point me in the right direction.

Is there any way at all that we can create our own HTML Elements?

I've seen a Custom ComboBox that was created using Javascript months back, but cannot find it anymore.

Basically, I'd like to create my own 'Control', that I can use for my pages. Maybe something that can be just 'plugged in' (although not a requirement). Any thoughts/ideas/advice/links?

Any help is really appreciated. Thank you!

If you want to write a JQuery plug-in but don't know where to start, have a look at this site: http://stefangabos.ro/jquery/jquery-plugin-boilerplate

He's written a boilerplate code for a jquery plug-in, with plenty of comments explaining what to do and how to expand it. It should make a good starting point for you.