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 sendStaticPage(pagina, div, metodo,  variables, pantalla)
{
	var http = creaAjax();
		
   http.open(metodo, pagina, true);
	 
    http.onreadystatechange=function()
    {
        if (http.readyState == 1)
			
			if (div=="form")
				document.getElementById(div).innerHTML = "<center>Espere...</center>";
			else
				document.getElementById(div).innerHTML = "<br> <br><center><img src='./media/img/wait.gif' /></center>";
			


		if (http.readyState == 4){

			results = http.responseText;
			document.getElementById(div).innerHTML = results;
        }
    }
	http.setRequestHeader('Content-Type','application/x-www-form-urlencoded')
    http.send(variables);
}