function open_section(num)
{
	if(num == submenu_open_item)
		return;
	var sectionToOpen = document.getElementById('section'+num);
	if(sectionToOpen)
	{
		sectionToOpen.style.display = 'block';
		
		if(submenu_open_item)
		{
			var sectionToClose = document.getElementById('section'+submenu_open_item);
			sectionToClose.style.display = 'none';
		}
		submenu_open_item = num;
	}
}


function check_media_form(alert_fields, alert_agree)
{
	var f=document.forms['mediaform'];
	var err='';
	if(	f.imie.value=='' || 
		f.nazwisko.value==0 ||
		f.email.value=='' ||
		f.elements['medium[]'].selectedIndex < 0 ||
		f.tytul.value==''
	)
		err += alert_fields + '\n';
	if(f.zgoda.checked == false)
		err += alert_agree + '\n';

	if(err=='')
		f.submit();
	else
		alert(err);
}

function showPrevStrip()
{
}

function showStrip(k,n,self)
{
	var strNames = new Array('stripLinkHeader','stripLinkFooter');
	for(var i=1; i<=n; i++)
	{
		var o=document.getElementById('strip'+i);
		if(o)
		{
			if(i==k)
			{
				o.style.display = 'block';
				for(var j=0; j<strNames.length; j++)
				{
					var strip = document.getElementById(strNames[j]+i);
					if(strip)
						strip.style.backgroundColor='#fff';
				}
			}
			else
			{
				o.style.display = 'none';
				for(var j=0; j<strNames.length; j++)
				{
					var strip = document.getElementById(strNames[j]+i);
					if(strip)
						strip.style.backgroundColor='#e3ecf6';
				}
			}
		}
	}
/*
	if(k > 1)
	{
		document.getElementById('stripLinkPrev').style.display = 'inline';
	}
	else
		document.getElementById('stripLinkPrev').style.display = 'none';
*/
	if(document.all)
		document.location.href = '#top';
	else
		document.location.href = self+'#top';
}

function showYearStrip(id,list)
{
	var tA = list.split(',');
	for(var y in tA)
	{
		var yr = tA[y];
		var o = document.getElementById('year'+yr);
		if(yr == id)
		{
			document.getElementById('linkyear'+yr).className = 'selected';
			o.style.display = 'block';
			document.getElementById('main_column').style.height = (o.offsetHeight+80)+'px';
		}
		else
		{
			document.getElementById('linkyear'+yr).className = '';
			o.style.display = 'none';
		}
	}
}

function ResizeSections()
{
	if(!document.getElementById)
		return;

	var submenu = document.getElementById('submenu');
	if(!submenu || !submenu.offsetHeight)
		return;
		
	var h = submenu.offsetHeight;
	
	var mainarea = document.getElementById('main_column');
	if(!mainarea)
		return;

	if(mainarea.offsetHeight < h)
		mainarea.style.height = h+'px';
}