function creaAjax(){
  var objetoAjax=false;
  try {
   /*Para otros que no sean IE*/
   objetoAjax = new ActiveXObject("Msxml2.XMLHTTP");
  } catch (e) {
   try {
     /*Para IE*/
     objetoAjax = new ActiveXObject("Microsoft.XMLHTTP");
     } 
     catch (E) {
     objetoAjax = false;
   }
  }

  if (!objetoAjax && typeof XMLHttpRequest!='undefined') {
   objetoAjax = new XMLHttpRequest();
  }
  return objetoAjax;
}


function getInfo(id, tabla){
	
	var contenedor;	
	contenedor = document.getElementById('centerData');
	
	//alert(id);
	var loading = '<p><br><br><img src="siteImg/ajax-loader.gif"> Cargando información...</p>';
		
	ajax=creaAjax();
	ajax.open("GET", "includes/getInfo.ajax.php?id="+id+"&tabla="+tabla,true);
	ajax.onreadystatechange=function() {
		//window.setTimeout("", 3000);
		if (ajax.readyState==4) {
			contenedor.innerHTML = ajax.responseText;
	 	}
		else{
			//pause(100);
			contenedor.innerHTML =  loading ;
			
			
		}
	}
	ajax.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
	//ajax.send("id="+id+"&tabla="+tabla)
	ajax.send(null)
	//alert('algo');
}