/** XHConn - Simple XMLHTTP Interface - bfults@gmail.com - 2005-04-08        **
 ** Code licensed under Creative Commons Attribution-ShareAlike License      **
 ** http://creativecommons.org/licenses/by-sa/2.0/                           **/
var xmlhttp, bComplete = false;
var fnDone;
function XHConn1()
{
//  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;
//  xmlhttp.onreadystatechange = alertContents;

  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)
	         {
		        if (xmlhttp.status == 200) {
		                ocultar("cargando");		        
				bComplete = true;
				mostrar("cont_ajax1");
				ocultar("cont_ajax2");
				ocultar("cont_ajax3");

				fnDone(xmlhttp);
				if (xmlhttp.responseText.length ==0){
					alert("No se encontaron coincidencias");
				}
			}
      		}
	};
      xmlhttp.send(sVars);
    }
    catch(z) { return false; }
    return true;
  };
  return this;
}