function zobrazSkryj(idecko)
{
	el=document.getElementById(idecko).style;
	el.display=(el.display == 'block')?'none':'block';
}
function skryjZobraz(idecko)
{
	el=document.getElementById(idecko).style;
	el.display=(el.display == 'none')?'block':'none';
}

function Hide(tagname)
{
	elements = document.getElementsByTagName(tagname);
	for (i = 0; i < elements.length; i++)
	{
		if (elements[i].className.toLowerCase() != "hidden")
			continue;
		elements[i].style.display = "none";
	}
}

wopened=Array();
function wopen(url, nazev, sirka, vyska, x, y, resize)
{
  if(wopened[nazev])wopened[nazev].close();
  if(!x)x=0;if(!y)y=0;resize=(resize)?'yes':'no';
  wopened[nazev]=window.open(url, nazev, 'width='+sirka+', height='+vyska+', left='+x+', top='+y+', toolbar=no, directories=no, menubar=no, status=no, location='+resize+', scrollbars='+resize+', resizable='+resize);
  return false;
}