//codigo de eclipse.org

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) {
  iniciaSS();
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
  /*if(isAltoContrasteAtivado()) {
  	createCookie("style_ac", "1", 365);
  }
  else {
  	createCookie("style_ac", "0", 365);
  }*/
}

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

//alteracoes...
function aumentaFonte() {
	var title = getActiveStyleSheet();
	var title_array = title.split("-");
	var tam = title_array[1];
	tam++;
	if(tam>=1 && tam<=4) {
		setActiveStyleSheet("tam-"+tam);
	}
}

function diminuiFonte() {
	var title = getActiveStyleSheet();
	var title_array = title.split("-");
	var tam = title_array[1];
	tam--;
	if(tam>=1 && tam<=4) {
		setActiveStyleSheet("tam-"+tam);
	}
}

function ativaAltoContraste() {
  return;
  var link_ac, link_normal;
  link_normal = document.getElementById("cores");
  link_ac = document.getElementById("cores_ac");

  link_normal.disabled = true;
  link_ac.disabled = false;
}

function desativaAltoContraste() {
  return;
  var link_ac, link_normal;
  link_normal = document.getElementById("cores");
  link_ac = document.getElementById("cores_ac");

  link_normal.disabled = false;
  link_ac.disabled = true;
}

function isAltoContrasteAtivado() {
  return false;
  return !document.getElementById("cores_ac").disabled;
}

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

/*  cookie = readCookie("style_ac");
  var acOn = cookie ? cookie : "0";
  if(acOn=="1") {
    ativaAltoContraste()
  }
  else {
    desativaAltoContraste();
  }*/
}