function FontZoom(size)
{
  var element = document.getElementsByTagName("span");
  var components = new Array();
  for(i = 0, j = 0; i < element.length; i++) {
    attribute = element[i].getAttribute("id");
    if(attribute == "main-wrapper") {
      components[j] = element[i];
      j++;
    }
  }
  for (i = 0; i < components.length; i++)
    components[i].style.fontSize = size+'px';
}