var i=0;
var id=0;
var ready=0;
function alamakota(){
	cos();
	id=setInterval("cos();", 3000);
	ready=1;
}
function akcja(switcher)
{
	if (ready == 1)
	switch(switcher){
		case 1:clearInterval(id);break;
		case 2:id=setInterval("cos();", 3000);break;
	}
}
function cos(){
	var j,elem =document.getElementById('emedia');

	lista = elem.getElementsByTagName('div');

	for(j=0;j<lista.length;j++)
	{
		document.getElementById(lista[j].id).style.visibility = 'hidden';
		document.getElementById(lista[j].id).style.display = 'none';
	}
	document.getElementById(lista[i].id).style.visibility = 'visible';
	document.getElementById(lista[i].id).style.display = 'block';
	i++;
	if (i == lista.length)
	i=0;
}
function epopu(ovisible,style){
	document.getElementById('ezaproszenie').style.visibility = 'hidden';
	document.getElementById('ezaproszenie').style.display = 'none';
	document.getElementById('men1').className='menu';
	document.getElementById('eprogram').style.visibility = 'hidden';
	document.getElementById('eprogram').style.display = 'none';
	document.getElementById('men2').className='menu';
	document.getElementById('erejestracja').style.visibility = 'hidden';
	document.getElementById('erejestracja').style.display = 'none';
	document.getElementById('men3').className='menu';
	document.getElementById('ewspolpraca').style.visibility = 'hidden';
	document.getElementById('ewspolpraca').style.display = 'none';
	document.getElementById('men4').className='menu';

	if (ovisible == 'ezaproszenie'){
		document.getElementById('emedia').style.visibility = 'visible';
		document.getElementById('emedia').style.display = 'block';
	}else{
		document.getElementById('emedia').style.visibility = 'hidden';
		document.getElementById('emedia').style.display = 'none';
	}

	document.getElementById(ovisible).style.visibility = 'visible';
	document.getElementById(ovisible).style.display = 'block';
	document.getElementById(style).className='menu menudark';
}