// JavaScript Document

////////////////////// AJAX ////////////
function createRequestObject()
{
	var peticion;
    var browser = navigator.appName;
    if(browser == "Microsoft Internet Explorer")
	{
    	peticion = new ActiveXObject("Microsoft.XMLHTTP");
    }
	else
	{
    	peticion = new XMLHttpRequest();
	}
	return peticion;
}
 
var http = new Array();
function ObtDatos(url)
{
	var act = new Date();
	http[act] = createRequestObject();
	http[act].open('get', url);
	http[act].onreadystatechange = function() 
	{
	  if (http[act].readyState == 4) 
	  {
			if (http[act].status == 200 || http[act].status == 304) 
			{
				var texto;
				texto = http[act].responseText;
				var DivDestino = document.getElementById("combo_subsector");
				DivDestino.innerHTML = texto; 
			}
	  }
	}
	http[act].send(null);
}
 
function cambiar_combo() {

	var valor = document.form1.ID_sector.value;
	var valor2 = document.form1.ID_subsector.value;
	ObtDatos("ajax_busqueda_cargar_combo_subsectores.php?ID=" + valor + "&ID_subsector=" + valor2);
}