// JavaScript Document
var prefsLoaded = false;
var defaultFontSize = 100;
var currentFontSize = defaultFontSize;

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

}

function toggleColors(){
	if(currentStyle == "White"){
		setColor("Black");
	} else {
		setColor("White");
	}
}

function changeFontSize(sizeDifference){
	currentFontSize = parseInt(currentFontSize) + parseInt(sizeDifference * 15);

	if(currentFontSize > 150){
		currentFontSize = 150;
	} else if(currentFontSize < 60){
		currentFontSize = 60;
	}

	setFontSize(currentFontSize);
}

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

// Este onload se hace llamando el menu en core_menu.php
//window.onload = setUserOptions;

function setUserOptions(){
	if(!prefsLoaded){

		cookie = readCookie("fontSize");
		currentFontSize = cookie ? cookie : defaultFontSize;
		setFontSize(currentFontSize);
		
		prefsLoaded = true;
		//alert(cookie);
	}
}

window.onunload = saveSettings;

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