// JavaScript Document
var browser = null;
var id_antigo = null;

function createRequest()
{
  var request = null;
  try
  {
    request = new XMLHttpRequest();
	  browser = "other";
  }
  catch (trymicrosoft)
  {
    try
	{
      request = new ActiveXObject("Msxml2.XMLHTTP");
	  browser = "ie";
    }
	catch (othermicrosoft)
	{
      try
	  {
        request = new ActiveXObject("Microsoft.XMLHTTP");
	  browser = "ie";
      }
	  catch (failed)
	  {
        request = null;
      }
    }
  }

  if (request == null) {
    alert("Erro ao criar o objeto Ajax!");
  } else {
    return request;
  }
}

var requestCategorias = createRequest();
var requestSubCategorias = createRequest();
var requestDesigners = createRequest();

function replaceText(el, text)
{
  if (el != null)
  {
    clearText(el);
    var newNode = document.createTextNode(text);
    el.appendChild(newNode);
  }
}

function clearText(el)
{
  if (el != null)
  {
    if (el.childNodes)
	{
      for (var i = 0; i < el.childNodes.length; i++)
	  {
        var childNode = el.childNodes[i];
        el.removeChild(childNode);
      }
    }
  }
}

function getText(el)
{
  var text = "";
  if (el != null)
  {
    if (el.childNodes)
	{
      for (var i = 0; i < el.childNodes.length; i++)
	  {
        var childNode = el.childNodes[i];
        if (childNode.nodeValue != null)
		{
          text = text + childNode.nodeValue;
        }
      }
    }
  }
  return text;
}

function getCategorias()
{
	var txt_categoria = document.getElementById("txt_categoria").value;
	var txt_sub_categoria = document.getElementById("txt_sub_categoria").value;
	var txt_designer = document.getElementById("txt_designer").value;
	var url = "../includes/busca_ajax.php?txt_categoria=" + escape(txt_categoria) + "&txt_sub_categoria=" + escape(txt_sub_categoria) + "&txt_designer=" + escape(txt_designer) + "&tipo=2";
	requestCategorias.open("GET", url, true);
	requestCategorias.onreadystatechange = updateBusca;
	requestCategorias.send(null);
}

function updateBusca()
{
	if (requestEstado.readyState == 4)
	{
		if (requestEstado.status == 200)
		{
			var EstadoContent = requestEstado.responseText;
			var EstadoDiv = document.getElementById("div_sub_categoria");
			EstadoDiv.innerHTML = EstadoContent;
		}
		else
			alert("Erro! Status de request: " + requestEstado.status);
	}
}

function getSubCategorias()
{
	var txt_categoria = document.getElementById("txt_categoria").value;
	if ((id_antigo != txt_categoria) || id_antigo == null) {
		var url = "../includes/busca_ajax.php?txt_categoria=" + escape(txt_categoria) + "&tipo=1";
		requestSubCategorias.open("GET", url, true);
		requestSubCategorias.onreadystatechange = updateSubCategorias;
		requestSubCategorias.send(null);
	}
	id_antigo = txt_categoria;	
}

function updateSubCategorias()
{
	if (requestSubCategorias.readyState == 4)
	{
		if (requestSubCategorias.status == 200)
		{
			var SubCategoriasContent = requestSubCategorias.responseText;
			var SubCategoriasDiv = document.getElementById("div_sub_categoria");
			if(SubCategoriasDiv){
				SubCategoriasDiv.innerHTML = SubCategoriasContent;
				NFInit();
			}
		}
		else
			alert("Erro! Status de request: " + requestSubCategorias.status);
	}
}

function controlaDesigner(valor) {
	document.getElementById("txt_designer").disabled = valor != "" ? 'disabled' : '';
}

function controlaCategoria(valor) {
	document.getElementById("txt_categoria").disabled = valor != "" ? 'disabled' : '';
}