var prefsLoaded = false;
var defaultFontSize = 80;
var currentFontSize = defaultFontSize;

//try to preload images, ok
//todo: change to an array parameter and do a for iteration
function preLoadImages(){
	if(!document.images) return;
	var ar = new Array();
	//var arguments = preLoadImages.arguments;
	//for(var i = 0; i < arguments.length; i++){
		ar[0] = new Image();
		//ar[0].src = arguments[i];
		ar[0].src = "templates/cbb-naranja/images/aleman_on.jpg";
		ar[1] = new Image();
		ar[1].src = "templates/cbb-naranja/images/cultura_on.jpg";
		ar[2] = new Image();
		ar[2].src = "templates/cbb-naranja/images/politica_on.jpg";
		ar[3] = new Image();
		ar[3].src = "templates/cbb-naranja/images/social_on.jpg";
	//}
}

function toggleBackground(cuadro,on){
	var cell = document.getElementById("cuadro_" + cuadro);
	cell.style.background = "url(/joomla/templates/cbb-naranja/images/" + cuadro + "_" + on + ".jpg)";
}

function revertStyles(){

	currentFontSize = defaultFontSize;
	changeFontSize(0);

}

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

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

	if(currentFontSize > 100){
		currentFontSize = 100;
	}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;
};

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);
}