/** 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 multi_seleccionar(arg1,arg2,arg3,seleccion) {
  var orig=document.getElementById(arg1+'_'+arg3);
  var dest=document.getElementById(arg2+'_'+arg3);
  for(i=0;i<orig.length;i++) {
    if ((seleccion!="" && orig.options[i].value==seleccion) || (seleccion=="" && orig.options[i].selected)) {
      orig.options[i].selected=false;
      dest.appendChild(orig.options[i]);
      i--;
    }
  }
  var sel=document.getElementById('sel_'+arg3);
  var sel2=document.getElementById(arg3);
  var lista='';
  for(i=0;i<sel.length;i++) {
    if(i>0) lista=lista+',';
    lista=lista+sel.options[i].value;
  }
  sel2.value=lista;
}

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