function menu_onmouseout(id)
{
id.style.backgroundImage = "url(./image/button.gif)";
}

function menu_onmouseover(id)
{
id.style.backgroundImage = "url(./image/button1.gif)";
}

function alternative_iframe(adresa,sirka,vyska)
	{
	var nAgt = navigator.userAgent;

	var IE = '<!-'+'-[if IE]><iframe src="'+adresa+'" frameborder="0" style="border: 0; height: '+vyska+'; width: '+sirka+'; text-align: center; margin: 0; padding: 0;"></iframe><![endif]-'+'->';
	var Ine = '<object type="text/html" data="'+adresa+'" style="border: 0; height: '+vyska+'; width: '+sirka+'; text-align: center; margin: 0; padding: 0;"><param name="src" value="'+adresa+'" />Alternate content for browsers without object support.</object>';

	if ((verOffset=nAgt.indexOf("MSIE"))!=-1) 
		{document.write(IE);} else {document.write(Ine);}
	}