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;
    }
  }
}

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 null;
}

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 = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}

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

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);





// FONT SIZE MANAGEMENT 
function FindObj(n, d) { //v4.01
var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=FindObj(n,d.layers[i].document);
if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function ChangeProp(objName,x,theProp,theValue) { //v6.0
var obj = FindObj(objName);
if (obj && (theProp.indexOf("style.")==-1 || obj.style)){
if (theValue == true || theValue == false)
eval("obj."+theProp+"="+theValue);
else eval("obj."+theProp+"='"+theValue+"'");
}
}

function LoadActualFontSize() {
tempArray = document.cookie.split(";");
for (tA = 0; tA < tempArray.length; tA++){
if (tempArray[tA].indexOf('fontSize') > -1){
fontSizeValue = tempArray[tA].split("=")
ACTUAL_FONTSIZE = parseInt(fontSizeValue[1]);
}
}
}

function SaveActualFontSize() {
var expire = new Date ();
expire.setTime (expire.getTime() + (6000 * 24 * 3600000));
expire = expire.toGMTString();
document.cookie="fontSize="+ACTUAL_FONTSIZE+"; path=/; expires="+expire;
}

function Bigger() {
ACTUAL_FONTSIZE = ACTUAL_FONTSIZE+1;
if (ACTUAL_FONTSIZE > LARGEST_FONTSIZE) { ACTUAL_FONTSIZE = LARGEST_FONTSIZE }
ChangeProp('texto','','style.fontSize',ACTUAL_FONTSIZE,'SPAN');
SaveActualFontSize();
footer();
}

function Smaller() {
ACTUAL_FONTSIZE = ACTUAL_FONTSIZE-1
if (ACTUAL_FONTSIZE < SMALLEST_FONTSIZE) { ACTUAL_FONTSIZE = SMALLEST_FONTSIZE }
ChangeProp('texto','','style.fontSize',ACTUAL_FONTSIZE,'SPAN');
SaveActualFontSize();
footer();
}

ACTUAL_FONTSIZE = 15;
SMALLEST_FONTSIZE = 10;
LARGEST_FONTSIZE = 20;