// Browser & System detect
var detect = navigator.userAgent.toLowerCase();
var OS,browser,version,total,thestring;

if (checkIt('konqueror')) { browser = "Konqueror"; OS = "Linux"; }
else if (checkIt('safari')) browser = "Safari"
else if (checkIt('omniweb')) browser = "OmniWeb"
else if (checkIt('opera')) browser = "Opera"
else if (checkIt('webtv')) browser = "WebTV";
else if (checkIt('icab')) browser = "iCab"
else if (checkIt('msie')) browser = "Internet Explorer"
else if (checkIt('netscape')) browser = "Netscape"
else if (checkIt('gecko')) browser = "Mozilla"
else if (!checkIt('compatible')) { browser = "Netscape Navigator"; version = detect.charAt(8); }
else browser = "An unknown browser";

if (!version) version = detect.charAt(place + thestring.length);

if (!OS) {
	if (checkIt('linux')) OS = "Linux";
	else if (checkIt('x11')) OS = "Unix";
	else if (checkIt('mac')) OS = "Mac"
	else if (checkIt('win')) OS = "Windows"
	else OS = "an unknown operating system";
}

function checkIt(string)
{
	place = detect.indexOf(string) + 1;
	thestring = string;
	return place;
}


// Open window
function WOpen(name,url,w,h,s,r)
{
	return(window.open(url,name,"toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars="+s+",resizable="+r+",fullscreen=no,channelmode=no,width="+w+",height="+h));
}


// Layer data replace
function layer_data_replace(layer_id,layer_data)
{
	if (browser=='Netscape') {
		document.layers[layer_id].document.open(); 
		document.layers[layer_id].document.write(layer_data); 
		document.layers[layer_id].document.close(); 
	}
	else if (browser=='Internet Explorer') {
		document.all[layer_id].innerHTML=layer_data;
	} else {
		document.getElementById(layer_id).innerHTML=layer_data;
	}
}


// **********  ukrywanie i odkrywanie <tr> ************ 
function GetDisplayShow() 
{
	if (navigator.userAgent.search('Gecko')>0)
		return 'table-row';
	else
		return 'block';
}
function ShowHideItem(id, DisplayStatus)
{
	document.getElementById(id).style.display = DisplayStatus ? GetDisplayShow() : 'none';
}