//generales
function abrir(surl, bscroll, iwidth, iheidht)
{ 
 var ileft = (screen.width - iwidth) / 2;
 var itop = (screen.height - iheidht) / 2; 
 window.open(surl,"","toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars="+bscroll+",resizable=no,left="+ileft+",top="+itop+",width="+iwidth+",height="+iheidht);
}

function popup(surl, sname, bscroll, iwidth, iheidht)
{ 
 var ileft = (screen.width - iwidth) / 2;
 var itop = (screen.height - iheidht) / 2; 
 window.open(surl,sname,"toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars="+bscroll+",resizable=no,left="+ileft+",top="+itop+",width="+iwidth+",height="+iheidht);
}

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];}
}

function validarEncuesta(form)
{
 var ok = 0;
 for (i=0;i<form.opcion.length;i++)
  {
   if(form.opcion[i].checked == true)
    {
     ok = 1; 
    }
  }	
   
 if (ok == 0)
  {
   alert("Debe ingresar primero una opción.");
    return false;
  }
}  

function validarBusqueda(valor)
{
 if (valor != '')
  {
   return true;
  }
 else
  {	
   alert("Debe ingresar una palabra para que inicie la búsqueda.");
   return false;
  }
}

function posicionar_contenedor() {
	if (screen.width > 1024) {
		document.getElementById("contenedor").style.width = "100%";
		document.getElementById("contenedor").style.margin = "10px auto 10px auto";
	}
}

function tamanoTexto(accion) {
	var obj = document.getElementById("cuerpo");
	var max = 180;
	var min = 90;
	if (obj.style.fontSize == '') {
		obj.style.fontSize = "100%";
	}
	
	if (accion == "i" ) {
		valCookie = readCookie("cuerpo");
		if (valCookie != null) {
			obj.style.fontSize = valCookie;
		}
		else {
			createCookie("cuerpo", "100%", 365);
			obj.style.fontSize = "100%";
		}
	}

	actual = parseInt(obj.style.fontSize);
	incremento = 10;
	
	if ((accion == "a") && ((actual+incremento) <= max)) {
		valor = actual+incremento;
		obj.style.fontSize = valor+"%";
		obj.lineHeight = valor+"%";
		createCookie("cuerpo", valor+"%", 365);
	}
	
	if ((accion == "d") && ((actual+incremento) >= min)) {
		valor = actual-incremento;
		obj.style.fontSize = valor+"%";
		obj.lineHeight = valor+"%";
		createCookie("cuerpo", valor+"%", 365);
	}
} 

//Cookies
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 var 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 eraseCookie(name) {
	createCookie(name,"",-1);
}