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 var 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;
}

var fontsize = {
     normalID : 'fNormal',
     bigID : 'fBig',
     hugeID : 'fHuge',
     class_array : new Array('' , 'large' , 'largest'),
     state : null,
     init : function() {
          //sprawdzenie, czy istnieja kontrolki do zmiany rozmiaru
          var norm = document.getElementById(fontsize.normalID);
          var big = document.getElementById(fontsize.bigID);
          var huge = document.getElementById(fontsize.hugeID);
          if (!norm || !big || !huge) return;
          var s = readCookie('bc');
          if (s === null) {
               createCookie('bc',0);
               fontsize.state = 0;
          } else {
               fontsize.state = s;
               fontsize.setClass(s);
          }
          
          norm.onclick = function() { fontsize.setClass(0); return false; }
          big.onclick = function() { fontsize.setClass(1); return false; }
          huge.onclick = function() { fontsize.setClass(2); return false; }
     },
     setClass : function(level)     {
          document.getElementsByTagName('body')[0].className = fontsize.class_array[level];
		  createCookie('bc',level);
     }
}