/* JS DOM: How can I select all elements with one class or another. I need to select elements with the class ad, and elements with the class adsbygoogle, but I want to select an element with just one of those, not both.BTW, this is a chrome extension, so no jQuery. I would also like to be able to add more classes later. Here is the code: */

window.onload = function() {
    //theoretical starts here
    var ads = document.getElementsByClassName('ad' or 'adsbygoogle');
    //theoretical ends here
    while(ads[0]) {
        ads[0].parentNode.removeChild(ads[0]);
    }
}