function $(e){if(typeof e=='string')e=document.getElementById(e);return e};
function collect(a,f){var n=[];for(var i=0;i<a.length;i++){var v=f(a[i]);if(v!=null)n.push(v)}return n};

ajax={};

ajax.x=function(){try{return new ActiveXObject('Msxml2.XMLHTTP')}catch(e){try{return new ActiveXObject('Microsoft.XMLHTTP')}catch(e){return new XMLHttpRequest()}}};

ajax.serialize=function(f){
  var g=function(n){
    return f.getElementsByTagName(n);
  };
  var nv=function(e){
    if(e.name)return encodeURIComponent(e.name)+'='+encodeURIComponent(e.value);
    else return ''
  };
  var i=collect(g('input'),function(i){if((i.type!='radio'&&i.type!='checkbox')||i.checked)return nv(i)});
  var s=collect(g('select'),nv);
  var t=collect(g('textarea'),nv);
  return i.concat(s).concat(t).join('&');
};

ajax.send=function(u,f,m,a){
  var x=ajax.x();
  x.open(m,u,true);
  x.onreadystatechange=function(){
    if(x.readyState==4)f(x.responseXML)
  };
  if(m=='POST')x.setRequestHeader('Content-type','application/x-www-form-urlencoded');
  x.send(a)
};

ajax.sendNoCache=function(u,f,m,a){
  u = u + (u.indexOf('?') < 0 ? '?' : '&') + new Date().getTime();
  var x=ajax.x();
  x.open(m,u,true);
  x.onreadystatechange=function(){
    if(x.readyState==4)f(x.responseText)
  };
  if(m=='POST')x.setRequestHeader('Content-type','application/x-www-form-urlencoded');
  x.send(a)
};

ajax.get=function(url,func){ajax.send(url,func,'GET')};
ajax.getNoCache=function(url,func){url = url + (url.indexOf('?') < 0 ? '?' : '&') + new Date().getTime();ajax.send(url,func,'GET')};
ajax.gets=function(url){var x=ajax.x();x.open('GET',url,false);x.send(null);return x.responseText};
ajax.getsNoCache=function(url){url = url + (url.indexOf('?') < 0 ? '?' : '&') + new Date().getTime();var x=ajax.x();x.open('GET',url,false);x.send(null);return x.responseText};
ajax.post=function(url,func,args){ajax.send(url,func,'POST',args)};
ajax.postNoCache=function(url,func,args){ajax.sendNoCache(url,func,'POST',args)};
ajax.update=function(url,elm){var e=$(elm);var f=function(r){e.innerHTML=r};ajax.get(url,f);};
ajax.updateNoCache=function(url,elm){var e=$(elm);var f=function(r){e.innerHTML=r};ajax.getNoCache(url,f);};
ajax.submit=function(url,elm,frm){var e=$(elm);var f=function(r){e.innerHTML=r};ajax.post(url,f,ajax.serialize(frm))};
ajax.submitNoCache=function(url,elm,frm){var e=$(elm);var f=function(r){e.innerHTML=r};ajax.postNoCache(url,f,ajax.serialize(frm))};