var sizes = new Array('small', 'medium', 'large', 'x-large');

	function getActiveStyleSheet()
	{
		return size;
	}

	function setActiveStyleSheet(size)
	{
		try{
		document.body.style.fontSize = sizes[size];	
		}catch(e){}
	}
	function decrease_style()
	{
		if(size > 0 ) size--;
		document.body.style.fontSize = sizes[size];	
	}

	function increase_style()
	{
		if(size < 2 ) size++;
		document.body.style.fontSize = sizes[size];	
	}
	function getPreferredStyleSheet()
	{
		return 0;
	}

	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("style");
	  var size = cookie ? cookie : getPreferredStyleSheet();
	  setActiveStyleSheet(size);
	}

	window.onunload = function(e) {
	  var size = getActiveStyleSheet();
	  createCookie("style", size, 365);
	}

	var cookie = readCookie("style");
	var size = cookie ? cookie : getPreferredStyleSheet();
	setActiveStyleSheet(size);