var agt=navigator.userAgent.toLowerCase();
  var ie5 = ((parseInt(navigator.appVersion) == 4) && (agt.indexOf("msie 5.0")!=-1) && (agt.indexOf("opera") == -1));


function get_obj(name) {

  if (document.getElementById && !ie5) {
    obj=document.getElementById(name);
  } else if (document.layers) {
    obj=document.layers[name];
  } else if (document.all) {
    obj=document.all[name];
  } else {
    obj=false;
  }

  return obj;
}

function get_obj_style(name) {

  if (document.getElementById && !ie5) {
    obj=document.getElementById(name).style;
  } else if (document.layers) {
    obj=document.layers[name];
  } else if (document.all) {
    obj=document.all[name].style;
  } else {
    obj=false;
  }
  return obj;
}

function hide_obj(name) {

  if (document.getElementById && !ie5) {
    obj=document.getElementById(name).style.visibility = "hidden";
    document.getElementById(name).style.display = "none";
  } else if (document.layers) {
    obj=document.layers[name].visibility = "hide";
    document.layers[name].display = "none";
  } else if (document.all) {
    obj=document.all[name].style.visibility = "hidden";
    document.all[name].display = "none";
  } else {
    obj=false;
  }
}

function show_obj(name) {

  if (document.getElementById && !ie5) {
    obj=document.getElementById(name).style.visibility = "visible";
    document.getElementById(name).style.display = "block";
  } else if (document.layers) {
    obj=document.layers[name].visibility = "show";
    document.layers[name].display = "block";
  } else if (document.all) {
    obj=document.all[name].style.visibility = "visible";
    document.all[name].display = "block";
  } else {
    obj=false;
  }
}
function przejdz_do_strony(adres) {
	document.location=adres;
}
function przejdz_do(adres) {
	document.location=adres;
}

function pokaz_zdjecie(zdjecie,width,height,id){
	if(!id)	id=0;
	var url = 'cgs_klasy/zoom.php?id='+id+'&file='+zdjecie;
    var Win = window.open(url,'zdjecie','width='+width+',height='+height+',innerWidth='+width+',innerHeight='+height+',resizable=no,scrollbars=no,menubar=no,toolbar=no');
}

function wartosc_pola(pole){
	if(pole.value){
		return pole.value;
	}
	else{
		for(i=0;i<pole.length;i++){
			if(pole[i].checked==true){
				return pole[i].value;
			}
		}
	}
}
function sprawdz_pola(){
	for(i=0;i<pola;i++){
		setTimeout(sprawdzane[i],1);
	}
}

function otworz_okno(url,width,height,scrolbars,resizable){
	if(scrolbars){
		scrolbars='yes';
	}
	else scrolbars='no';
	if(resizable){
		resizable='yes';
	}
	else resizable='no';

	var Win = window.open(url,'okno','width='+width+',height='+height+',innerWidth='+width+',innerHeight='+height+',resizable='+resizable+',scrollbars='+scrolbars+',menubar=no,toolbar=no');
}


function getCookie(name) {
  var dc = document.cookie;
  var prefix = name + "=";
  var begin = dc.indexOf("; " + prefix);
  if (begin == -1) {
    begin = dc.indexOf(prefix);
    if (begin != 0) return null;
  } else
    begin += 2;
  var end = document.cookie.indexOf(";", begin);
  if (end == -1)
    end = dc.length;
  return unescape(dc.substring(begin + prefix.length, end));
}

function setCookie(NazwaCookie, Nowe) {
if (Nowe!=null) {
 Teraz=new Date();
 Teraz.setTime(Termin = (24*60*60*365) + Teraz.getTime());
 Termin= (Teraz.toGMTString());
 //document.cookie= NazwaCookie+"=" + escape(Nowe) + "; path=/; domain=swistak.pl; expires=" + Termin + "";
 document.cookie= NazwaCookie+"=" + escape(Nowe) + "; expires=" + Termin + "";
 }
}

function ustaw_wys(){
  	wys_cont=get_obj('content_div').offsetHeight;
	wys_sub=get_obj('submenu_div').offsetHeight;
	wys_lewy_blok=get_obj('lewy_blok_div').offsetHeight;
	wys=wys_cont-wys_sub;
	if(wys>wys_lewy_blok){
		get_obj_style('lewy_blok_div').height=wys+'px';
	}
}