Using regular expression in css?

Question

I have an html page with divs that have id(s) of the form s1, s2 and so on.

Answer 1

You can manage selecting those elements without any form of regex as the previous answers show, but to answer the question directly, yes you can use a form of regex in selectors:

#sections div[id^='s'] {
    color: red;  
}

That says select any div elements inside the #sections div that have an ID starting with the letter 's'.

See fiddle here.

W3 CSS selector docs here.