/* old stuff */

function fontsizeup() {
  active = getActiveStyleSheet();
  switch (active) {
    /*case 'A--' : 
      setActiveStyleSheet('A-');
      break;*/
    case 'A-' : 
      setActiveStyleSheet('A');
      break;
    case 'A' : 
      setActiveStyleSheet('A+');
      break;
    case 'A+' : 
      setActiveStyleSheet('A++');
      break;
    case 'A++' :
      break;
    default :
      setActiveStyleSheet('A');
      break;
  }
}

function fontsizedown() {
  active = getActiveStyleSheet();
  switch (active) {
    case 'A++' : 
      setActiveStyleSheet('A+');
      break;
    case 'A+' : 
      setActiveStyleSheet('A');
      break;
    case 'A' : 
      setActiveStyleSheet('A-');
      break;
    case 'A-' : 
      setActiveStyleSheet('A-');
      break;
    /*case 'A--' : 
       break;*/
    default :
      setActiveStyleSheet('A');
      break;
  }
}

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")) {
      if( a.getAttribute("title").indexOf('A') != -1 ){
	  	a.disabled = true;
	  }
      if(a.getAttribute("title") == title){
		  	//alert(a.getAttribute("title"));
			a.disabled = false;
	  }
	  
	 
    }
  }
}

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() {
  return ('A');
}

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;
}

/* end old stuff */

function contrast(){
	active = getActiveContrast();
	//alert(active);
	if(active == 'C-'){ setActiveContrast('C+'); }
	else{ setActiveContrast('C-'); }
	
}

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



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


function getPreferredContrast() {
  return ('C+');
}


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 readCookieContrast(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 = function(e) {
  
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);  
  
  var cookieContrast = readCookieContrast("contrast");
  var titleContrast = cookieContrast ? cookieContrast : getPreferredContrast();
  setActiveContrast(titleContrast); 

  
}

window.onunload = function(e) {
   
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);  
  
  var contrast = getActiveContrast();
  createCookie("contrast", contrast, 365);
  
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
if (title == 'null') {
  title = getPreferredStyleSheet();
}


var cookieContrast = readCookieContrast("contrast");
var titleContrast = cookieContrast ? cookieContrast : getPreferredContrast();
if (titleContrast == 'null') {
  titleContrast = getPreferredContrast();
}
//fins aqui ok contrast

setActiveStyleSheet(title);
setActiveContrast(titleContrast);