function revertStyles(fontsize){
	currentFontSize = fontsize;
	changeFontSize(0);
}

function changeFontSize(sizeDifference){	
	var fontSize = 11;
	switch(currentFontSize + sizeDifference){
		case 1:
			fontSize = 9;
			break;
		case 2:
			fontSize = 10;
			break;
		case 3:
			fontSize = 11;
			break;
		case 4:
			fontSize = 12;
			break;
		case 5:
			fontSize = 13;
			break;
		case 6:
			fontSize = 14;
			break;
		default:
			return;
	}
	document.body.style.fontSize = fontSize + 'px';
	currentFontSize = currentFontSize + sizeDifference;	
	createCookie("currentFontSize", currentFontSize, 365);	
};

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=/";
}