function creaAjax(){var objetoAjax=false;try{objetoAjax=new ActiveXObject("Msxml2.XMLHTTP")}catch(e){try{objetoAjax=new ActiveXObject("Microsoft.XMLHTTP")}catch(E){objetoAjax=false}}if(!objetoAjax&&typeof XMLHttpRequest!='undefined'){objetoAjax=new XMLHttpRequest()}return objetoAjax}function FAjax(url,capa,valores){var ajax=creaAjax();var capaContenedora=document.getElementById(capa);if(capaContenedora){ajax.open('POST',url,true);ajax.onreadystatechange=function(){if(ajax.readyState==4){if(ajax.status==200){capaContenedora.innerHTML=ajax.responseText}else if(ajax.status==404){capaContenedora.innerHTML="La direccion no existe"}else{capaContenedora.innerHTML="Error: "+ajax.status;capaContenedora.innerHTML+="<br>"+ajax.responseText}}}}else{alert('Capa no encontrada')}ajax.setRequestHeader('Content-Type','application/x-www-form-urlencoded');ajax.send(valores);return}