var b_timer;
var dhtml = document.getElementById ? true : false;

if (dhtml)
	{
	document.write ('<style type="text/css">');
	document.write ('#menu li ul.sub_tisk {display:none;}');
	document.write ('#menu li ul.sub_zakazky {display:none;}');
	document.write ('</style>');
	}

function setBottomVisibility(element,newVisibility)
	{ 
	if (dhtml)
		{
		document.getElementById(element).style.display = newVisibility;
		}
	}

function showBottomMenu(m_id)
	{
	if (dhtml)
		{
		clearTimeout(b_timer);
		setBottomVisibility(m_id,'block');
		}
	}

function hideBottomMenu(m_id)
	{
	if (dhtml)
		{ 
/*		b_timer = setTimeout("setBottomVisibility(m_id,'none')",50);*/
		b_timer = setTimeout("setBottomVisibility('"+m_id+"','none')",100);
		}
	}
	
function dontHideBottomMenu()
	{
	if (dhtml) clearTimeout(b_timer);
	}