<!-- Lets user change size of font -->

function setFont()
{
  document.getElementById("myBody").style.fontSize = "12px";
}

function changeFontSize(inc)
{
  var curSize = document.getElementById("mybody").style.fontSize;
  var newSize = parseInt(curSize.substring(0, curSize.indexOf("px")));
  <!--newSize += inc;-->
  if(newSize > 4 && newSize < 40) newSize += inc;
  document.getElementById("myBody").style.fontSize = newSize;
}

<!-- end user change size of font-->