function changeDisplay(id) {
var div = document.getElementById(id);
if (div.className=='invisivel') {div.className='visivel';}
else {div.className='invisivel';}
}

function sizeFont2(elem, acao)
{
    var tamInic = 14;
    var tamMin = 6;
    var tamMax = 20;
   if (document.getElementById(elem).style.fontSize == "") 
      var tamFonte = tamInic;
    else
      var tamFonte = parseInt(document.getElementById(elem).style.fontSize);
    switch (acao)
    {
      case '+':
        if (tamFonte < tamMax)
          document.getElementById(elem).style.fontSize = (tamFonte + 2) + "px";
      break;
      case '-':
        if (tamFonte > tamMin)
          document.getElementById(elem).style.fontSize = (tamFonte - 2) + "px";
      break;
    }
}

function addFav(){
    var url        = "http://www.biologias.com";
    var title    = "Biologias.com - Seu canal das biologias";
    if (window.sidebar) window.sidebar.addPanel(title, url,"");
    else if(window.opera && window.print){
        var mbm = document.createElement('a');
        mbm.setAttribute('rel','sidebar');
        mbm.setAttribute('href',url);
        mbm.setAttribute('title',title);
        mbm.click();
    }
    else if(document.all){window.external.AddFavorite(url, title);}
}

function criaXMLHttp() {
	if (typeof XMLHttpRequest != "undefined")
	return new XMLHttpRequest();
	else if (window.ActiveXObject){
	var versoes = ["MSXML2.XMLHttp.5.0","MSXML2.XMLHttp.4.0", "MSXML2.XMLHttp.3.0",	"MSXML2.XMLHttp", "Microsoft.XMLHttp"];
	}
	for (var i = 0; i < versoes.length; i++){
	try{
	return new ActiveXObject(versoes[i]);
	}catch (e) {}
	}
	throw new Error("Seu browser nao suporta AJAX");
}

function calendario(mes,ano) {
	var divInfo = document.getElementById("calenda");
	var XMLHttp = criaXMLHttp();
	XMLHttp.open("get", "http://biologias.com/eventos/cal.php?mes=" + mes + "&ano=" + ano, true);
	XMLHttp.onreadystatechange = function () {
	if (XMLHttp.readyState == 4)
	if (XMLHttp.status == 200){	
	var result = XMLHttp.responseText;
	divInfo.innerHTML = result;
	} 
	else {	divInfo.innerHTML = "Um erro ocorreu" + XMLHttp.statusText;	}	
	};
	XMLHttp.send(null);
}

function tag(tag1,tag2){
var textarea = document.getElementById("area");
	// Code for IE
		if (document.selection) 
			{
				textarea.focus();
				var sel = document.selection.createRange();
				//alert(sel.text);
				sel.text = tag1 + sel.text + tag2;
			}
   else 
    {  // Code for Mozilla Firefox
		var len = textarea.value.length;
	    var start = textarea.selectionStart;
		var end = textarea.selectionEnd;
		
        var sel = textarea.value.substring(start, end);
	    //alert(sel);
		var rep = tag1 + sel + tag2;
        textarea.value =  textarea.value.substring(0,start) + rep + textarea.value.substring(end,len);
	}
}

function busca() {
	var divresultado = document.getElementById("busca");
	divresultado.innerHTML = "carregando...";
	var XMLHttp = criaXMLHttp();
	XMLHttp.open("get", "http://biologias.com/galeria/menu2.php", true);
	XMLHttp.onreadystatechange = function () {
	if (XMLHttp.readyState == 4)
	if (XMLHttp.status == 200){	
	var result = XMLHttp.responseText;
	divresultado.innerHTML = result;
	} 
	else {	divresultado.innerHTML = "Um erro ocorreu" + XMLHttp.statusText;	}	
	};
	XMLHttp.send(null);
}

function busca2() {
	var divresultado = document.getElementById("busca");
	divresultado.innerHTML = "carregando...";
	var XMLHttp = criaXMLHttp();
	XMLHttp.open("get", "http://biologias.com/videos/menu2.php", true);
	XMLHttp.onreadystatechange = function () {
	if (XMLHttp.readyState == 4)
	if (XMLHttp.status == 200){	
	var result = XMLHttp.responseText;
	divresultado.innerHTML = result;
	} 
	else {	divresultado.innerHTML = "Um erro ocorreu" + XMLHttp.statusText;	}	
	};
	XMLHttp.send(null);
}

var mapaobj;
var geocoder; 
var alvo2 = document.getElementById("locais");
var nivelZoom = [];
    nivelZoom[0] = 2;
    nivelZoom[1] = 8;
    nivelZoom[2] = 9;
    nivelZoom[3] = 10;
    nivelZoom[4] = 12;
    nivelZoom[5] = 13;
    nivelZoom[6] = 14;
    nivelZoom[7] = 15;
    nivelZoom[8] = 16;
function inicializa() {
    mapaobj = new GMap2(document.getElementById("mapa"));
    mapaobj.setCenter(new GLatLng(34, 0), 1);
    geocoder = new GClientGeocoder();
}
function resolverEnderecos(resposta) {
    mapaobj.clearOverlays(); 
    if (!resposta || resposta.Status.code != G_GEO_SUCCESS) {
        alvo2.innerHTML = "Nao foi possivel localizar o endereco solicitado";
        alvo2.innerHTML = "Código de erro: " +  resposta.Status.code;
    } else {
        var num_resultados = resposta.Placemark.length;
        var alvo = document.getElementById("locais");
        listarLocais(alvo, resposta.Placemark);           
        if (num_resultados > 1) {
              alvo2.innerHTML = 'A sua consulta retornou resultados ambígüos.' +
                    '\nEscolha a localidade mais adequada à consulta.';
        } else {
          var local = resposta.Placemark[0];
          var ponto = local.Point.coordinates;
          var acc = resposta.Placemark[0].AddressDetails.Accuracy;
          centralizaMapa(ponto[1],ponto[0],resposta.Placemark[0].address, acc);         
       }
    }
}
function listarLocais(alvo, placemark) {
   alvo.innerHTML = "<p> A pesquisa retornou " +
                         placemark.length + " resultado(s): </p>";
    for (var i=0; i<placemark.length; ++i) {
        var uf = placemark[i].AddressDetails.Country
                            .AdministrativeArea.AdministrativeAreaName; 
        var acc = placemark[i].AddressDetails.Accuracy;
        var p = placemark[i].Point.coordinates;
        var info = placemark[i].address;
        alvo.innerHTML +="<a href='javascript:centralizaMapa(" + p[1] + 
                         "," + p[0] + ",\"" + info + "\", " + acc +
                         ")'>" + placemark[i].address +"</a><br />";
      }
  } 
function centralizaMapa(x, y, info, acc) {
    var p = new GLatLng(x,y);
    var zoom = nivelZoom[acc];
    mapaobj.setCenter(p,zoom);
    marcador = new GMarker(p);
    mapaobj.addOverlay(marcador);
    marcador.openInfoWindowHtml("<b> " + info + "</b>");    
  }
function ap(el){
var x = document.getElementById(el);
x.style.opacity=1.0;
x.style.filter="alpha(opacity='100')";
}
function dap(e){
var y = document.getElementById(e);
y.style.opacity=0.3;
y.style.filter="alpha(opacity='30')";
}
function abrir(foto) {
	location.href="#foto";
	changeDisplay('ajuda');	
	var fotos = document.getElementById("ajuda");
	fotos.innerHTML = "";
	var XMLHttp = criaXMLHttp();
	XMLHttp.open("get", "http://biologias.com/meio-ambiente/abrir.php?foto=" + foto, true);
	XMLHttp.onreadystatechange = function () {
	if (XMLHttp.readyState == 4)
	if (XMLHttp.status == 200){
	var result = XMLHttp.responseText;
	fotos.innerHTML = result;
	} 
	else { fotos.innerHTML = "Um erro ocorreu" + XMLHttp.statusText;	}	
	};
	XMLHttp.send(null);
}