// JavaScript Document
// Precarga de imagenes
function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}
function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}
function MM_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=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

// Cambio de tamaño del texto del contenido.
var minsize=20;    //20;
var maxsize=200;   //300;
var defecto=100;
var actual=100;
var actualboton=100;
var Tope=0;

function aumentarTexto(div){ 
 if (Tope<4){
 actual = actual+7;
 actualboton=actualboton+1;
 if (actual > maxsize) {
  actual = maxsize
 }
 var formInputs = document.getElementsByTagName('body');
   formInputs[0].style.fontSize=actual+"%";
   
 if ((Tope<4)) {
	var formInputs1 = document.getElementsByTagName('a');
   	/*formInputs1[0].style.fontSize=actualboton+"%";		
  	formInputs1[1].style.fontSize=actualboton+"%";
   	formInputs1[2].style.fontSize=actualboton+"%";
   	formInputs1[3].style.fontSize=actualboton+"%";*/
   	formInputs1[4].style.fontSize=actualboton+"%";
   	/*formInputs1[5].style.fontSize=actualboton+"%";
   	formInputs1[6].style.fontSize=actualboton+"%";*/
	Tope=Tope+1;
 }
}
}

function disminuirTexto(div) {
 if (Tope>=1 && Tope<=4){
 actual = actual-7;
  actualboton=actualboton-1;
 if (actual < minsize) {
  actual = minsize
 } 
 if ((Tope<=4)) {
 var formInputs = document.getElementsByTagName('body');    
   formInputs[0].style.fontSize=actual+"%";
   
    var formInputs1 = document.getElementsByTagName('a');
   	formInputs1[0].style.fontSize=actualboton+"%";		
   	formInputs1[1].style.fontSize=actualboton+"%";
   	formInputs1[2].style.fontSize=actualboton+"%";
   	formInputs1[3].style.fontSize=actualboton+"%";
   	formInputs1[4].style.fontSize=actualboton+"%";
   	formInputs1[5].style.fontSize=actualboton+"%";
   	formInputs1[6].style.fontSize=actualboton+"%";
	actualboton=100;
	Tope=Tope-1;
 }
}
}

function defectoTexto(div) {
 actual = defecto; 
  actualboton=actualboton-20;
 var formInputs = document.getElementsByTagName('body');    
   formInputs[0].style.fontSize=actual+"%";
   var formInputs1 = document.getElementsByTagName('a');
   	formInputs1[0].style.fontSize=actualboton+"%";		
   	formInputs1[1].style.fontSize=actualboton+"%";
   	formInputs1[2].style.fontSize=actualboton+"%";
   	formInputs1[3].style.fontSize=actualboton+"%";
   	formInputs1[4].style.fontSize=actualboton+"%";
   	formInputs1[5].style.fontSize=actualboton+"%";
   	formInputs1[6].style.fontSize=actualboton+"%";
	actualboton=100;
   Tope=0;
}

//Otro cambio de tamaño del texto del contenido.
var contador=0;
function sizear(){
 if((arguments[arguments.length-1])=='menos'){
  if(contador<-2)return; 
   contador--;
   for(ii=0;ii<arguments.length-1;ii++){
    if(isNaN(parseInt(document.getElementById(arguments[ii]).style.fontSize)))continue;
    document.getElementById(arguments[ii]).style.fontSize=(parseInt(document.getElementById(arguments[ii]).style.fontSize)-0.1)+'em';
   }
   }
   else
   {
     if(contador>2)return; 
     contador++;
     for(ii=0;ii<arguments.length-1;ii++){
     if(isNaN(parseInt(document.getElementById(arguments[ii]).style.fontSize)))continue;
     document.getElementById(arguments[ii]).style.fontSize=(parseInt(document.getElementById(arguments[ii]).style.fontSize)+0.1)+'em';
   }
 }
}


//Funcion para desplegar los textos colapsados (como los de la pag de inicio).
function ver(op){  
   obj = document.getElementById(op);
   if (obj.style.display == ""){ obj.style.display="none";}
   else  {obj.style.display="";} 
}






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) {
  setActiveStyleSheet('normal');
}

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

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

//FIN funciones para cambiar hoja de estilos


var min=12;
var max=30;

function decreaseFontSize() {
   var p = document.getElementsByTagName('p');
   var h = document.getElementsByTagName('H3');
   for(i=0;i<p.length;i++) {
      if(p[i].style.fontSize) {
         var s = parseInt(p[i].style.fontSize.replace("px",""));
      } else {
         var s = 18;
      }
      if(s!=min) {
         s -= 1;
      }
      p[i].style.fontSize = s+"px"
   }  
     for(i=0;i<h.length;i++) {
      if(h[i].style.fontSize) {
         var s1 = parseInt(h[i].style.fontSize.replace("px",""));
      } else {
         var s1 = 18;
      }
      if(s!=max) {
         s1 -= 1;
      }
      h[i].style.fontSize = s1+"px"  
   }
}

//Funciones para cambiar la hoja de estilo.
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 increaseFontSize() {
   var p = document.getElementsByTagName('p');
   var h = document.getElementsByTagName('H3');
   for(i=0;i<p.length;i++) {
      if(p[i].style.fontSize) {
         var s = parseInt(p[i].style.fontSize.replace("px",""));
      } else {
         var s = 18;
      }
      if(s!=max) {
         s += 1;
      }
      p[i].style.fontSize = s+"px"  
   }
   for(i=0;i<h.length;i++) {
      if(h[i].style.fontSize) {
         var s1 = parseInt(h[i].style.fontSize.replace("px",""));
      } else {
         var s1 = 18;
      }
      if(s!=max) {
         s1 += 1;
      }
      h[i].style.fontSize = s1+"px"  
   }
}



document.getElementById("mas").onclick = function() {increaseFontSize(); }
document.getElementById("menos").onclick = function() {decreaseFontSize(); }

document.getElementById("cont").onclick = function() {setActiveStyleSheet('alto_contraste'); }
document.getElementById("normal").onclick = function() {setActiveStyleSheet('normal'); }