//public functions
function x_cont(url,prm){
  var jp = new jsPHP('void(0)');
  jp.cmd(url,prm,false);
  return jp.getdata();
}

function x_val(id,url,prm,async){
  var jp = new jsPHP('changevalue("'+id+'")');
  jp.cmd(url,prm);
}

function x_htm(id,url,prm,async){
  var jp = new jsPHP('changehtml("'+id+'")');
  jp.cmd(url,prm,async);
}

function x_exec(url,prm,async){
  var jp = new jsPHP('runjs()');
  jp.cmd(url,prm,async);
}
  
//ajax-handler class
function jsPHP(efunc){
  
  var req;
  var data = null;
  var exefunction = efunc;
  
  this.cmd = cmd;
  this.getdata = getdata;

  // if Mozilla, Safari etc
  if (window.XMLHttpRequest) 
    req = new XMLHttpRequest()
  // if IE
  else if (window.ActiveXObject){ 
    try {
      req = new ActiveXObject("Msxml2.XMLHTTP")
    } 
    catch (e){
      try{ req = new ActiveXObject("Microsoft.XMLHTTP") }catch (e){}
    }
  }else{
    alert('This Browser do not support AJAX-Technology!');
    return ;
  }
  
  //handle status
  req.onreadystatechange = reqreadystatechange;
  
  function reqreadystatechange() {
      if (req.readyState != 4)return;
        if (req.status == 200) {
          data = req.responseText;
          try {
            eval(exefunction);
          }catch (e){
            alert('ERROR executing result!');
          }
        }else{
          alert('ERROR loading data :-(');
        }
  }
  
  function cmd(url,prm,async){
    if(!prm) prm='';
    if(async!=false && async!=true) async=true;
    
    _doajax(url,prm,async);
  }
  
  function getdata(){
    return data;
  }
  
  function changevalue(id){
    document.getElementById(String(id)).value = data;
  }
  
  function changehtml(id){
    document.getElementById(String(id)).innerHTML = data;
  }
  
  function runjs(){
    eval(data);
  }
 
  function _doajax(url,prm,async) {
    data = null;
    if(!url || url==''){
      alert('Requestfile is not set!');
      return;
    }else{ url = 'phpinc='+url ;}
    
    if(prm!='') url += '&' + prm;
    req.open('POST', 'ajax.php' , async);
    req.setRequestHeader("Method", "POST " + 'ajax.php' + " HTTP/1.1");
    req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
    req.send(url);
  }
}