var fontSize = 12;

//From http://www.w3schools.com/js/js_cookies.asp
function getCookie(c_name)
{
if (document.cookie.length>0)
  {
  c_start=document.cookie.indexOf(c_name + "=");
  if (c_start!=-1)
    {
    c_start=c_start + c_name.length+1;
    c_end=document.cookie.indexOf(";",c_start);
    if (c_end==-1) c_end=document.cookie.length;
    return unescape(document.cookie.substring(c_start,c_end));
    }
  }
return "";
}

window.addEvent('domready', function() {
	
	var smaller = $('smallerFont');
	var larger = $('largerFont');
	var div = $('scalable');
	var fs = getCookie('fontSize');
	if (fs != "") {
		fontSize = fs;
	}
	if(smaller != null && larger != null && div != null) {
		div.setStyle("font-size",fontSize + "px");
		smaller.addEvent('click', function(){
			if ( fontSize > 10 ) {
				fontSize = parseInt(fontSize) - 1;
			}
			document.cookie = 'fontSize='+fontSize;
			div.setStyle("font-size",fontSize + "px");
		});
		larger.addEvent('click', function(){
			if ( fontSize < 13 ) {
				fontSize = parseInt(fontSize) + 1;
			}
			document.cookie = 'fontSize='+fontSize;
			div.setStyle("font-size",fontSize + "px");
		});
	}
});