var prefsLoaded = false;
var defaultFontSize = 75;
var currentFontSize = defaultFontSize;

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

function changeFontSize(sizeDifference){
	currentFontSize = parseInt(currentFontSize) + parseInt(sizeDifference * 5);

	if(currentFontSize > 100){
		currentFontSize = 100;
	}else if(currentFontSize < 50){
		currentFontSize = 50;
	}

	setFontSize(currentFontSize);
}

function setFontSize(fontSize){
	document.body.style.fontSize = fontSize + '%';
}

function createCookie(name,value,days) {
	var date = new Date();
	date.setTime(date.getTime()+(days*24*60*60*1000));
	var expires = "; expires="+date.toGMTString();
	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 = setUserOptions;

function setUserOptions(){
	if(!prefsLoaded){
		cookie = readCookie("fontSize");
		currentFontSize = cookie ? cookie : defaultFontSize;
		setFontSize(currentFontSize);

		prefsLoaded = true;
	}
}

window.onunload = saveSettings;

function saveSettings() {
  createCookie("fontSize", currentFontSize, 365);
}

var WindowObjectReference;

function openPopup(strUrl, strWindowName, intWidth, intHeight) {
	WindowObjectReference = window.open(strUrl, strWindowName, 'width='+intWidth+',height='+intHeight+',resizable=yes,scrollbars=yes,status=yes');
	WindowObjectReference.focus();
}