var xmlHttp;
var id;
function showDataInput() {
  id = "result";
  document.getElementById(id).innerHTML="Loading...";
  str   = document.converter.cur_from.value;
  strto = document.converter.cur_to.value;
  val   = document.converter.val.value;
  res1  = document.converter.result1text.value;
  res2  = document.converter.result2text.value;
  path  = document.converter.path.value;

  var url = path + "convert.php?from=" + str + "&to=" + strto + "&val=" + val + "&res1=" + res1 + "&res2=" + res2;
  xmlHttp = GetXmlHttpObject(stateChanged);
  xmlHttp.open("GET", url , true);
  xmlHttp.send(null);
}

function stateChanged() {
  if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete") {
    document.getElementById(id).innerHTML=xmlHttp.responseText ;
  }
}

function GetXmlHttpObject(handler) {
  var objXmlHttp=null;
  if (navigator.userAgent.indexOf("Opera")>=0) {
    alert("This example doesn't work in Opera") ;
    return ;
  }
  if (navigator.userAgent.indexOf("MSIE")>=0) {
    var strName="Msxml2.XMLHTTP";
    if (navigator.appVersion.indexOf("MSIE 5.5")>=0) {
      strName="Microsoft.XMLHTTP";
    } try {
      objXmlHttp=new ActiveXObject(strName);
      objXmlHttp.onreadystatechange=handler ;
      return objXmlHttp;
    } catch(e) {
      alert("Error. Scripting for ActiveX might be disabled");
      return;
    }
  }
  if (navigator.userAgent.indexOf("Mozilla")>=0) {
    objXmlHttp=new XMLHttpRequest();
    objXmlHttp.onload=handler;
    objXmlHttp.onerror=handler;
    return objXmlHttp;
  }
}