function XHConn(){
  var xmlhttp, bComplete = false;
  try { xmlhttp = new ActiveXObject("Msxml2.XMLHTTP"); }
  catch (e) { try { xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); }
  catch (e) { try { xmlhttp = new XMLHttpRequest(); }
  catch (e) { xmlhttp = false; }}}
  if (!xmlhttp) return null;
  this.connect = function(sURL, sMethod, sVars, fnDone){
    if (!xmlhttp) return false;
    bComplete = false;
    sMethod = sMethod.toUpperCase();
    try {
      if (sMethod == "GET"){
        xmlhttp.open(sMethod, sURL+"?"+sVars, true);
        sVars = "";
      } else {
        xmlhttp.open(sMethod, sURL, true);
        xmlhttp.setRequestHeader("Method", "POST "+sURL+" HTTP/1.1");
        xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
      }
      xmlhttp.onreadystatechange = function(){
			if (xmlhttp.readyState == 4 && !bComplete){
			  bComplete = true;
			  fnDone(xmlhttp);
			}
		};
      xmlhttp.send(sVars);
    }
    catch(z) { return false; }
    return true;
  };
  return this;
}

function cargar_contenido(target, source, id){
 document.getElementById(target).innerHTML = '<p class="load"><img src="http://www.orbitablogs.com/shared/header/images/loading/azul.gif" align="absmiddle"></p>';
     var myConn = new XHConn();
        if (!myConn) alert("XMLHTTP no esta disponible. Inténtalo con un navegador más actual.");
        var peticion = function (oXML) {  document.getElementById(target).innerHTML = oXML.responseText; };
        myConn.connect(source, "GET", "", peticion);
		active(id);
}

function active(id){
	document.images['bot5'].src='http://www.orbitablogs.com/shared/header/images/botones/5.gif';
	document.images['bot6'].src='http://www.orbitablogs.com/shared/header/images/botones/6.gif';
	document.images['bot7'].src='http://www.orbitablogs.com/shared/header/images/botones/7.gif';
	document.images['bot8'].src='http://www.orbitablogs.com/shared/header/images/botones/8.gif';
	
	rutaactivo='http://www.orbitablogs.com/shared/header/images/botones/'+id+'a.gif';
	document.getElementById('bot'+id).src=rutaactivo;
}