function nad(obr) 
{
  {img=eval(obr+"_on.src");
  document[obr].src = img;
  }
}

function prec(obr) {
   img=eval(obr+"_off.src");
    document[obr].src = img;
}



 Image1_on = new Image();
 Image1_on.src ="../images/troj_biely.gif";
 Image1_off = new Image();
 Image1_off.src="../images/spacer.gif";
 
 Image2_on = new Image();
 Image2_on.src ="../images/troj_biely.gif";
 Image2_off = new Image();
 Image2_off.src="../images/spacer.gif";
 
 Image3_on = new Image();
 Image3_on.src ="../images/troj_biely.gif";
 Image3_off = new Image();
 Image3_off.src="../images/spacer.gif";
 
 Image4_on = new Image();
 Image4_on.src ="../images/troj_biely.gif";
 Image4_off = new Image();
 Image4_off.src="../images/spacer.gif";
 
 Image5_on = new Image();
 Image5_on.src ="../images/troj_biely.gif";
 Image5_off = new Image();
 Image5_off.src="../images/spacer.gif";
 
 Image6_on = new Image();
 Image6_on.src ="../images/troj_biely.gif";
 Image6_off = new Image();
 Image6_off.src="../images/spacer.gif";
 
 Image7_on = new Image();
 Image7_on.src ="../images/troj_biely.gif";
 Image7_off = new Image();
 Image7_off.src="../images/spacer.gif";
 
function otvor(theURL,wx,wy,okno) {
	mx = Math.round((screen.width-wx)/2);
//	if (okno=='') okno='infolib';
	window.open(theURL,'infolib',"width="+wx+",height="+wy+",toolbar=no,directories=no,scrollbars=yes,location=no,resizable=yes,menubar=no,left="+mx+",top=10").focus();
}

function otvor_search (theURL,wx,wy) {
mx = Math.round((screen.width-wx)/2);
tab = window.open(theURL,"search","width="+wx+",height="+wy+",toolbar=no,directories=no,scrollbars=yes,location=no,resizable=yes,menubar=no,left="+mx+",top=10").focus();
}

var flash2Installed = false;
	var flash3Installed = false;
	var flash4Installed = false;
	var flash5Installed = false;
	var flash6Installed = false;
	var maxVersion = 6;
	var actualVersion = 0;
	var jsVersion = 1.0;
	
	function flashdetect () {	
		var isIE = (navigator.appVersion.indexOf("MSIE") != -1) ? true : false;	
		var isWin = (navigator.appVersion.indexOf("Windows") != -1) ? true : false; 
		jsVersion = 1.1;
		// write vbscript detection if we're not on mac.
		if(isIE && isWin){ // don't write vbscript tags on anything but ie win
			document.write('<SCR' + 'IPT LANGUAGE=VBScript\> \n');
			document.write('on error resume next \n');
			document.write('flash2Installed = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.2"))) \n');
			document.write('flash3Installed = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.3"))) \n');
			document.write('flash4Installed = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.4"))) \n');
			document.write('flash5Installed = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.5"))) \n');	
			document.write('flash6Installed = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.6"))) \n');	
			document.write('</SCR' + 'IPT\> \n'); // break up end tag so it doesn't end our script
		}
			if (navigator.plugins){		
				if (navigator.plugins["Shockwave Flash 2.0"] 
				|| navigator.plugins["Shockwave Flash"]){	
					var isVersion2 = navigator.plugins["Shockwave Flash 2.0"] ? " 2.0" : "";
					var flashDescription = navigator.plugins["Shockwave Flash" + isVersion2].description;
					var flashVersion = parseInt(flashDescription.charAt(flashDescription.indexOf(".") - 1));
					flash2Installed = flashVersion == 2;		
					flash3Installed = flashVersion == 3;
					flash4Installed = flashVersion == 4;
					flash5Installed = flashVersion == 5;
					flash6Installed = flashVersion == 6;
				}
			}
			for (var i = 2; i <= maxVersion; i++) {	
				if (eval("flash" + i + "Installed") == true) actualVersion = i;
			}
			if(navigator.userAgent.indexOf("WebTV") != -1) actualVersion = 2;	
			return actualVersion;

	}