/* <![CDATA[ */
function getHeight()
{
	/*
		Viz. http://pixy.cz/blogg/clanky/js-rozmery-okna.html
	*/
   if (window.innerHeight)
      return window.innerHeight;
   else if (document.documentElement && document.documentElement.clientHeight)
      return document.documentElement.clientHeight;
   else if (document.body && document.body.clientHeight)
      return document.body.clientHeight;
   else
      return null;
}

function moveToCenter()
{
	if(navigator.appName=="Microsoft Internet Explorer")
	{
		var vyska;
		var hlavniOkno;
		
		vyska = getHeight();
		vyska = (vyska/2)-250;
		
		hlavniOkno = document.getElementById('hlavni');
		hlavniOkno.style.margin=vyska+'px auto';
	}
}

window.onload = moveToCenter;
window.onresize = moveToCenter;
/* ]]> */