function objetoAjax(){
	var xmlhttp=false;
	try{
		xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
	}catch (e){
		try{
			xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
		}catch (E){
			xmlhttp = false;
		}
	}
	
	if (!xmlhttp && typeof XMLHttpRequest!='undefined'){
		xmlhttp = new XMLHttpRequest();
	}
	return xmlhttp;
}
function op_cambio(pagina){
	var ar_php = pagina;
	var divCambio  = document.getElementById('cambio');
	ajax = objetoAjax();
	ajax.open("GET", ar_php);
	ajax.onreadystatechange = function(){
		if (ajax.readyState==4){
			divCambio.innerHTML = ajax.responseText;
		}
	}
	ajax.send(null);
	aparecer();
}
function op_provincia(){
	var divProvincia  = document.getElementById('divprovincia');
	var id_dpto = document.frm_inscripcion.cbdpto.value;
	ajax = objetoAjax();
	ajax.open("POST", "c_provincia.php", true);
	ajax.onreadystatechange = function(){
		if (ajax.readyState==4){
			divProvincia.innerHTML = ajax.responseText
		}
	}
	ajax.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
	ajax.send("id_dpto="+id_dpto)
}
function op_distrito(){
	var divDistrito  = document.getElementById('divdistrito');
	var id_dpto = document.frm_inscripcion.cbdpto.value;
	var id_provincia = document.frm_inscripcion.cbprovincia.value;
	ajax = objetoAjax();
	ajax.open("POST", "c_distrito.php", true);
	ajax.onreadystatechange = function(){
		if (ajax.readyState==4){
			divDistrito.innerHTML = ajax.responseText
		}
	}
	ajax.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
	ajax.send("id_prov="+id_provincia+"&id_dpto="+id_dpto)
}