var prefsLoaded = false;
var currentStyle = "White";
var currentFontSize = 1;
var fontMax = 1.4;
var fontMin = 1;
var fontVariation = 1;
var feuille='compact';

function setFontSize(fontSize){
	var stObj = (document.getElementById) ? document.getElementById('conteneur') : document.all('conteneur');
	stObj.style.fontSize = fontSize + 'em';
};

function toggleFont(){
	if (currentFontSize == fontMax){
		fontVariation=-1;
	}else if (currentFontSize == fontMin){
		fontVariation=1;
	}
	currentFontSize = parseFloat(currentFontSize) + parseFloat(fontVariation*0.2);
	setFontSize(currentFontSize);

	return false;
}

function toggleStyle(){
	if(feuille == 'fluid'){
		setActiveStyleSheet('compact');
	}else{
		setActiveStyleSheet('fluid');
	}
	return false;
}

function toggleColors(){
	if(currentStyle == "White"){
		setColor("Black");
	}else{
		setColor("White");
	}
	return false;
}
function setColor(color){
	if(color != "White"){
		document.body.className = 'retro';
		currentStyle = "Black";
	}else{
		document.body.className = '';
		currentStyle = "White";
	}
	return false;
}

// ----------------------------------------------
// StyleSwitcher functions written by Paul Sowden
// http://www.idontsmoke.co.uk/ss/
// - - - - - - - - - - - - - - - - - - - - - - -
// For the details, visit ALA:
// http://www.alistapart.com/stories/alternate/

function setActiveStyleSheet(title) {
   var i, a, main;
   for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
     if(a.getAttribute("rel").indexOf("style") != -1
        && a.getAttribute("title")) {
       a.disabled = true;
       if(a.getAttribute("title") == title) a.disabled = false;
     }
   }
   feuille=title;
}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return 'compact';
}




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;
};


function setUserOptions(){
	createErgo();
	if(!prefsLoaded){
  		var cookie = readCookie("style");
  		feuille = cookie ? cookie : getPreferredStyleSheet();
  		setActiveStyleSheet(feuille);

		cookie = readCookie("fontSize");
		currentFontSize = cookie ? cookie : 1;
		setFontSize(currentFontSize);
		
		cookie = readCookie("pageColor");
		currentStyle = cookie ? cookie : "White";
		setColor(currentStyle);

		prefsLoaded = true;
	}
}


function saveSettings()
{
  createCookie("style", feuille, 365);
  createCookie("fontSize", currentFontSize, 365);
  createCookie("pageColor", currentStyle, 365);
}

function createErgo()
{
	var blocErgo = document.createElement('dl');
	blocErgo.setAttribute('id', 'access');
	
	var blocTitre = document.createElement('dt');
	blocTitre.appendChild(document.createTextNode('Ergonomie'));
	blocErgo.appendChild(blocTitre);
	
	var blocStyle = document.createElement('dd');
	var lienStyle = document.createElement('a');
	lienStyle.setAttribute('href', '#');
	lienStyle.setAttribute('title', 'Passer en version Etendue / Compacte');
	lienStyle.setAttribute('id', 'fluidcompact');
	if( !lienStyle.addEventListener )
	{
	    lienStyle.addEventListener = function(eventType, listener, useCapture) {
	        this.attachEvent("on" + eventType, listener);
	    }
	}
	lienStyle.addEventListener('click', toggleStyle,false);
	lienStyle.appendChild(document.createTextNode('Design Etendu / Compact'));
	blocStyle.appendChild(lienStyle);
	
	blocErgo.appendChild(blocStyle);

	blocStyle = document.createElement('dd');
	lienStyle = document.createElement('a');
	lienStyle.setAttribute('href', '#');
	lienStyle.setAttribute('title', 'Changer la taille de la police de caractères');
	lienStyle.setAttribute('id', 'fontsize');
	if( !lienStyle.addEventListener )
	{
	    lienStyle.addEventListener = function(eventType, listener, useCapture) {
	        this.attachEvent("on" + eventType, listener);
	    }
	}
	lienStyle.addEventListener('click', toggleFont,false);
	lienStyle.appendChild(document.createTextNode('Changer la taille de la police de caractères'));
	blocStyle.appendChild(lienStyle);
	
	blocErgo.appendChild(blocStyle);

	blocStyle = document.createElement('dd');
	lienStyle = document.createElement('a');
	lienStyle.setAttribute('href', '#');
	lienStyle.setAttribute('title', 'Contraste plus important');
	lienStyle.setAttribute('id', 'bgcolor');
	if( !lienStyle.addEventListener )
	{
	    lienStyle.addEventListener = function(eventType, listener, useCapture) {
	        this.attachEvent("on" + eventType, listener);
	    }
	}
	lienStyle.addEventListener('click', toggleColors,false);
	lienStyle.appendChild(document.createTextNode('Contraste inversé'));
	blocStyle.appendChild(lienStyle);

	blocErgo.appendChild(blocStyle);
	
	document.getElementById('colonne-gauche').appendChild(blocErgo);
	
}

if( document.getElementById )
{
	//document.addEventListener('load', setUserOptions, false);
	//document.addEventListener('unload', saveSettings, false);
	window.onunload=saveSettings;
}