// JavaScript Document

var prefsLoaded = false;
var defaultFontSize = 12;
var currentFontSize = defaultFontSize;

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

	if(currentFontSize > 14){
		currentFontSize = 14;
	}else if(currentFontSize < 10){
		currentFontSize = 10;
	}

	setFontSize(currentFontSize);
};

function setFontSize(fontSize){
//	var stObj = (document.getElementById) ? document.getElementById('content_area') : document.all('content_area');
	document.body.style.fontSize = fontSize + 'px';
	
	//alert (document.body.style.fontSize);
};

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 = setWidthFont;

function setWidthFont(){
	if(!prefsLoaded){
		cookie = readCookie("fontSize");
		currentFontSize = cookie < 15 ? cookie : defaultFontSize;
		setFontSize(currentFontSize);
		
		prefsLoaded = true;
	}
}

window.onunload = saveSettings;

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