var size = 100;
var percent;

function zoomup(){ 
  if (size == 100) {
    for (i = 1; i < document.getElementsByTagName('div').length; i++) {
      document.getElementsByTagName('div')[i].style.width = "96%";
      document.getElementsByTagName('div')[i].style.paddingLeft = "0%";
      document.getElementsByTagName('div')[i].style.paddingRight = "0%";
      document.getElementsByTagName('div')[i].style.margin = "1%";
      document.getElementsByTagName('div')[i].style.backgroundColor = "#ffffff";
    }
    for (i = 0; i < document.getElementsByTagName('ul').length; i++) {
      document.getElementsByTagName('ul')[i].style.backgroundColor = "#ffffff";
    }
    document.getElementsByTagName('address')[0].style.width = "98%";
    document.getElementsByTagName('address')[0].style.paddingLeft = "1%";
    document.getElementsByTagName('address')[0].style.paddingRight = "1%";
  }
  if (size <= 500) {
    size = size + 50;
    percent = size + "%";
    document.body.style.fontSize = percent;
  }
}
function reset(){ 
    size = 100;
    percent = size + "%";
    document.body.style.fontSize = percent;
}