//Create a boolean variable to check for a valid Internet Explorer instance.
var zstxmlhttp = false;
//Check if we are using IE.
try {
//If the Javascript version is greater than 5.
zstxmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
//If not, then use the older active x object.
try {
//If we are using Internet Explorer.
zstxmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
} catch (E) {
//Else we must be using a non-IE browser.
zstxmlhttp = false;
}
}

//If we are using a non-IE browser, create a javascript instance of the object.
if (!zstxmlhttp && typeof XMLHttpRequest != 'undefined'){
  zstxmlhttp = new XMLHttpRequest();
}

function ZSTloadXMLDoc(){

zstxmlhttp.open("GET", "/" + "subor" + "/" + "poloha" + "/" + "stanica_vy_gen" + ".php" + "?" + "id" + "=" + "178954");
zstxmlhttp.onreadystatechange = function(){

  if(zstxmlhttp.readyState == 4 && zstxmlhttp.status == 200){
    ZSTobsah.innerHTML = zstxmlhttp.responseText;
    //polohainfo.innerHTML += '<br />';
  }
}

zstxmlhttp.send(null);
setTimeout("ZSTloadXMLDoc()", 20000);
}

ZSTloadXMLDoc();