var ns4 = (document.layers) ? true:false;
var ie4 = (document.all) ? true:false;
var ng5 = (document.getElementById) ? true:false;


function showElement(id) {
if (ng5){
 document.getElementById(id).style.visibility = "visible";
 document.getElementById(id).style.display="block";
}
else if (ns4) {
 document.layers[id].visibility = "show";
}
else if (ie4) {
 document.all[id].style.visibility = "visible";
 document.all[id].style.display="block";
}
}

function showInlineElement(id) {
if (ng5){
 document.getElementById(id).style.visibility = "visible";
 document.getElementById(id).style.display="inline";
}
else if (ns4) {
 document.layers[id].visibility = "show";
}
else if (ie4) {
 document.all[id].style.visibility = "visible";
 document.all[id].style.display="inline";
}
}


function hideElement(id) {
if (ng5){
 document.getElementById(id).style.visibility = "hidden";
 document.getElementById(id).style.display="none";
}
else if (ns4) {
 document.layers[id].visibility = "hide";
}
else if (ie4) {
 document.all[id].style.visibility = "hidden";
 document.all[id].style.display="none";
}
}


function getElement(id) {
if (ng5){
 return document.getElementById(id);
}
else if (ns4) {
 return document.layers[id];
}
else if (ie4) {
 return document.all[id];
}
return null;
}

function getDocElement(id, doc) {
if (ng5){
 return doc.getElementById(id);
}
else if (ns4) {
 return doc.layers[id];
}
else if (ie4) {
 return doc.all[id];
}
return null;
}

function hideDocElement(id,doc) {
if (ng5){
 doc.getElementById(id).style.visibility = "hidden";
 doc.getElementById(id).style.display="none";
}
else if (ns4) {
 doc.layers[id].visibility = "hide";
}
else if (ie4) {
 doc.all[id].style.visibility = "hidden";
 doc.all[id].style.display="none";
}
}

function pop(plik,w,h)
{
okno = null;
if(window.screen)
{
aw = screen.availWidth;
ah = screen.availHeight;
}
else
{
aw=640;
ah=480;
}
dane="width="+w+",height="+h+",left="
+(aw-w)/2+",top="
+(ah-h)/2 
+",toolbar=no,location=no,directories=no,"
+"status=no,menubar=no,"
+"scrollbars=yes,resizable=no";
okno=window.open(plik,'pop',dane);
}

function isEmpty(v) {
   return  v==null || v.length==0;
}	

function findPos(obj) {
  var offsetLeft = offsetTop = 0;
    while (obj) {
      offsetLeft += obj.offsetLeft;
      offsetTop  += obj.offsetTop;
      obj = obj.offsetParent;
  }
  return [offsetLeft, offsetTop];
}

function trim(x){return x.replace(/^\s+|\s+$/g,'');}

function hasClass(obj, clName) {
  var clN = ' ' + obj.className + ' ';
  return (clN.match(' ' + clName + ' ') != null);
}

function addClass(obj, clName) {
  if (hasClass(obj, clName)) return;
  obj.className = trim(obj.className + ' ' + clName);
}

function removeClass(obj, clName) {
  if (!hasClass(obj, clName)) return;
  var clN = ' ' + obj.className + ' ';
  eval("obj.className = trim(clN.replace(/ " + clName + " /g,''));");
}


function setCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else var expires = "";
  document.cookie = name+"="+escape(value)+expires+"; path=/;";
}

function getCookieValue(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return unescape(c.substring(nameEQ.length,c.length));
  }
  return null;
}