to be continued...

function change(){
   var ok = document.getElementsByClassName("refino-marca")[0];
   var ko = ok.children[1];
   if(ko.style.)
}
    
    window.onload = function(){
        var ok = document.getElementsByClassName("refino-marca")[0];
        var ko = ok.children[0];
        ko.addEventListener( 'click', change);
    }