Assigning classes to elements through CSS

Question

I\'d like to tell the browser to assign certain CSS classes to elements matching a particular selector. Can I do it with pure CSS and if yes, how?

Example: I want al

Answer 1

No, that isn't possible with pure CSS.

Only with JavaScript:

// jQuery
$("h5").addClass("ui-corners-all");

// Pure JavaScript
var elements = document.getElementsByTagName("h5");
for (var i=0; i