var ajax = null;if(window.XMLHttpRequest)ajax=new XMLHttpRequest();else if(window.ActiveXObject)ajax=new ActiveXObject("Microsoft.XMLHTTP");
function FAjax(url,capa,valores,metodo){if(metodo.toUpperCase()=='POST'){ajax.open('POST',url,true);ajax.onreadystatechange=function(){if(ajax.readyState==4){if(ajax.status==200){document.getElementById(capa).style.display='block';document.getElementById(capa).innerHTML=ajax.responseText;/*document.getElementById("cargando").style.display='none';*/}
else if(ajax.status==404){document.getElementById(capa).innerHTML="La direccion no existe";}
else{document.GetElementById(capa).innerHTML="Error: ".ajax.status;}}}
ajax.setRequestHeader('Content-Type','application/x-www-form-urlencoded');ajax.send(valores);return;}}