function ajaxFunction() {
  var xmlHttp;
  
  try {
   
    xmlHttp=new XMLHttpRequest();
    return xmlHttp;
  } catch (e) {
    
    try {
      xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
      return xmlHttp;
    } catch (e) {
      
	  try {
        xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
        return xmlHttp;
      } catch (e) {
        alert("Tu navegador no soporta AJAX!");
        return false;
      }}}
}
function Enviar(_pagina,capa) {
    var ajax;
    ajax = ajaxFunction();
    ajax.open("POST", _pagina, true);
   // ajax.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");

    ajax.onreadystatechange = function() {
		if (ajax.readyState==1){
			document.getElementById(capa).innerHTML = "<b>Cargando...</b>";
			     }
		if (ajax.readyState == 4) {
		   
                document.getElementById(capa).innerHTML=ajax.responseText; 
		     }}
			 
	ajax.send(null);
} 
function Enviar2(_pagina) {
    var ajax;
    ajax = ajaxFunction();
    ajax.open("POST", _pagina, true);
   // ajax.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");		 
	ajax.send(null);
} 
function calcular(a,e) {
	Enviar2('setear-produccion.php?a='+a+'&e='+e);
	setTimeout("Enviar('_produccion.php','produccion')", 1000);
}