var moze, cookie, expl;
if(document.getElementById) moze=true;
if(navigator.appName.indexOf("Explorer")>-1) expl=true;

function increasefontsize() {
	if(expl) e=event; else e=Event;
	if(e.keyCode==3 || e.keyCode==13 || !e.keyCode) {
	val=getbodysize();
	val+=10;
	if(val>90) val=90;
	setbodysize(val+"%");
	return false;
	}
}

function decreasefontsize() {
	if(expl) e=event; else e=Event;
	if(e.keyCode==3 || e.keyCode==13 || !e.keyCode) {
	val=getbodysize();
	val-=10;
	if(val<60) val=60;
	setbodysize(val+"%");
	return false;
	}
}

function setbodysize(value) {
	obj=document.getElementsByTagName("body");
	obj = obj[0];
	val = value;
	obj.style.fontSize=val;
	if(moze) createCookie("fontsize", val, 365);
}

function getbodysize() {
	obj=document.getElementsByTagName("body");
	bodyobj = obj[0];
	fnt=bodyobj.style.fontSize;
	val=parseInt(fnt.substring(0,fnt.length-1));
	return val;
}



function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

window.onload = function(e) {
 
  var cookie = readCookie("fontsize");
  val=cookie ? cookie : "70%";
  setbodysize(val);
}