jspikadasgalaxyas

var about_tags = document.getElementsByClassName('single-tab');

for(var a = 0;a< about_tags.length;a++){
  about_tags[a].onclick = function(){


    for(var b=0; b < about_tags.length; b++ ){
      about_tags[b].style['background-color'] = unseletected_color;
      about_tags[b].style['font-weigth'] = "normal";

    }
    this.style['background-color'] = seletected_color;
    this.style['font-weigth'] = 'bold';

    var selecionado = this.innerHTML;
    document.getElementById('box-text').innerHTML= aboutUs[selecionado];
  }

}