function getFontStyle() {
  var size = readCookie("fontSize");
  setFontStyle(size);
}

function setFontStyle(fontsize) {
  if (fontsize == 'small') {
      document.getElementById('articlecontents').className = 'fontsizesmall';
      document.getElementById('ctl00_ContentPlaceHolder1_fontsizeimage_small').src = 'images/fontsize-small_on.gif';
      document.getElementById('ctl00_ContentPlaceHolder1_fontsizeimage_medium').src = 'images/fontsize-medium_off.gif';
      document.getElementById('ctl00_ContentPlaceHolder1_fontsizeimage_large').src = 'images/fontsize-large_off.gif';
  } else if (fontsize == 'large') {
      document.getElementById('articlecontents').className = 'fontsizelarge';
      document.getElementById('ctl00_ContentPlaceHolder1_fontsizeimage_small').src = 'images/fontsize-small_off.gif';
      document.getElementById('ctl00_ContentPlaceHolder1_fontsizeimage_medium').src = 'images/fontsize-medium_off.gif';
      document.getElementById('ctl00_ContentPlaceHolder1_fontsizeimage_large').src = 'images/fontsize-large_on.gif';
  } else { 
      document.getElementById('articlecontents').className = 'fontsizemedium';
      document.getElementById('ctl00_ContentPlaceHolder1_fontsizeimage_small').src = 'images/fontsize-small_off.gif';
      document.getElementById('ctl00_ContentPlaceHolder1_fontsizeimage_medium').src = 'images/fontsize-medium_on.gif';
      document.getElementById('ctl00_ContentPlaceHolder1_fontsizeimage_large').src = 'images/fontsize-large_off.gif';
  }
}

function switchFontStyle(fontsize) {
  if (fontsize) {
    setFontStyle(fontsize);
    createCookie("fontSize", fontsize, 180);
  }
}

// http://www.quirksmode.org/js/cookies.html - create / read cookie
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;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}