not even sure what this is called

[greatergrey]

sorry for any general ignorance, but I am not even sure if this is CSS or HTML or even something else.

let's say I was listing some stuff, and I want to have it when you put the cursor over word, a box appears with related text in it, or possibly, and empty box next to the list that fills with text when the cursor sits or clicks on the text. can anyone tell what kind of code this would be, and maybe give me a example? thanks.

[Daniel T]

That can be done with CSS, but it won't work in Internet Explorer. You'll want to use JavaScript for that.

[ray326]

Try using a title attribute on the elements in question and see if that will do the job. Otherwise it's Javascript.