/* <![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;
			
			vyskaOriginal = getHeight();
			vyska = (vyskaOriginal/2)-400;
			
			hlavniOkno = document.getElementById('hlavni');
			
			if(vyskaOriginal>800)
			{
				hlavniOkno.style.margin=vyska+'px auto';
			}
			else
			{
				hlavniOkno.style.margin='30px auto';
			}
		}
	}

	window.onload = moveToCenter;
	window.onresize = moveToCenter;

/* ]]> */