function $(id) {
return document.getElementById(id);
}

var elem = new Array();
var ident;
    isNS4 = (document.layers) ? true : false;
    isIE4 = (document.all && !document.getElementById) ? true : false;
    isIE5 = (document.all && document.getElementById) ? true : false;
    isNS6 = (!document.all && document.getElementById) ? true : false;

function show(ident) {
	 	 
    if(isNS4) {
    document.layers[ident].display = "";
    }
    else if(isIE4) {
    document.all[ident].style.display = "";
    }
    else if (isIE5 || isNS6) {
    elm = document.getElementById(ident);elm.style.display = "";
    }
}

function hide(ident) {
	 
    if(isNS4) {
    document.layers[ident].display = "none";
    }
    else if(isIE4) {
    document.all[ident].style.display = "none";
    }
    else if (isIE5 || isNS6) {
    elm = document.getElementById(ident);elm.style.display = "none";
    }
}

function toggle(obj) {
	var el = document.getElementById(obj);
	el.style.display = (el.style.display != 'none' ? 'none' : '' );
}

function insertHtml(ident,txt){
   document.getElementById(ident).innerHTML=txt;
}


function winTopOpen(adres,szerokosc,wysokosc) 
	{	
      var w = 800, h = 600;

		if (document.all) {
		   w = document.body.clientWidth;
		   h = document.body.clientHeight;
		}
		else if (document.layers) {
		   w = window.innerWidth;
		   h = window.innerHeight;
		}
		
		leftVal = (w-szerokosc) / 2;
		topVal = (h-wysokosc) / 2;

		noweOkno = window.open(adres, 'okienko', 'menubar=no, toolbar=no, location=no, scrollbars=yes, resizable=no, status=no, width=' + szerokosc + ', height=' + wysokosc + ', left=' + leftVal + ', top=' + topVal +'');
}