// JavaScript Document

var aryFontSize = [ '1.4em', '1em', '0.8em' ];
function changeFontSize(e) {
var tgt = e.srcElement || e.target;
var lists = document.getElementById('fsbox').getElementsByTagName('LI');
var i = 0;
while (lists[i] != tgt) { i++; }
document.getElementById('main').style.fontSize = aryFontSize[i];
}
window.onload = function() {
var elm = document.getElementById('fsbox');
if (document.attachEvent) {
elm.attachEvent('onclick', changeFontSize)
} else if (document.addEventListener) {
elm.addEventListener('click', changeFontSize, false)
}
}