function limpiaerror(campo) {
	var mb = document.getElementById(campo);
	if (mb && mb.value!="") mb.style.backgroundColor='#FBC8D3;';
}

function isset(varname){
  return(typeof(window[varname])!='undefined');
}

function getel(myelement)
{
	if(document.getElementById(myelement)) return document.getElementById(myelement);
	else return false;
}

function show_hide(idCapa, fuerzaVisibilidad) 
{
	var capa = document.getElementById(idCapa);
	if (capa) 
	{ 
		if (fuerzaVisibilidad && fuerzaVisibilidad!="") {
			if (fuerzaVisibilidad=="visible") capa.style.display="";
			else capa.style.display="none";
		}
		else 
		{
			if (capa.style.display == "none") {
				capa.style.display = "";
			} else {
				capa.style.display = "none";
			}
		}
	}
}

/** 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/                           **/
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, auxParams)
  {
    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;
          if (auxParams!=undefined && auxParams!="") fnDone(xmlhttp,auxParams);
          else fnDone(xmlhttp);
        }};
      xmlhttp.send(sVars);
    }
    catch(z) { return false; }
    return true;
  };
  return this;
}

function redirecciona(arg) {
  document.location=arg;
}