var scriptsOn = false;

if (((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) >= 3)) || ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4)) || ((navigator.appName == "Opera") && (parseInt(navigator.appVersion) >= 6)))
 scriptsOn = true;

function RegisterImage(imgName, imgOn, imgOff) {
	if (scriptsOn) {
		eval (imgName + "1 = new Image()");
		eval (imgName + "1.src = \"" + imgOn + "\"");
		eval (imgName + " = new Image()");
		eval (imgName + ".src = \"" + imgOff + "\"");
	}
}

function ImageOver(imgName) {
	if (scriptsOn) {
		eval ("document." + imgName + ".src = " + imgName + "1.src");
	}
}
 
function ImageOut(imgName) {
	if (scriptsOn) {
		eval ("document." + imgName + ".src = " + imgName + ".src")
	}
}

function openwindow(adresa,sirka,vyska) {    
	var option = "toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,width=" + sirka +",height="+ vyska;
	okno = window.open(adresa, "okno", option);  
}

function openprog(adresa,sirka,vyska) {    
	var option = "toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,width=" + sirka +",height="+ vyska;
	okno = window.open(adresa, "okno", option);  
}

function posl_zmena() {
	document.write('<script language="JavaScript">\n');
	document.write('<!-- \n');
	document.write('var datum = new Date(document.lastModified); \n');
	document.write('var rok = 1900; \n');
	document.write('if ((datum.getYear() > 100) && (datum.getYear() < 200)) { \n');
	document.write('rok+= datum.getYear(); \n');
	document.write('}  else { \n');
	document.write('rok = datum.getYear(); \n');
	document.write('} \n');
	document.write('document.write(" ",datum.getDate(),".",datum.getMonth()+1,".",rok); \n');
	document.write('//--> \n');
	document.write('</script> \n');
}