function EnableBox(object, boxId)
{
	if(!object)
	{
		return false;
	}
	
	if(!document.getElementById(boxId))
	{
		return false;
	}
	
	document.getElementById('box-login').style.display = "none";
	document.getElementById('box-register').style.display = "none";
	document.getElementById('box-newsletter').style.display = "none";
	
	document.getElementById('a-login').className = "";
	document.getElementById('a-register').className = "";
	document.getElementById('a-newsletter').className = "";
	
	object.className = "active";
	document.getElementById(boxId).style.display = "block";
	
	return true;
}

function EnableRightBox(object, boxId)
{
	if(!object)
	{
		return false;
	}
	
	if(!document.getElementById(boxId))
	{
		return false;
	}
	
	boxes = [
		'kontext-article-menu',
		'bestread-article-menu',
		'bestscore-article-menu',
		'bestcomment-article-menu',
		'next-article-menu'
	];
	
	for(var i in boxes)
	{
		if(document.getElementById(boxes[i]))
		{
			document.getElementById('a-' + boxes[i]).className = "";
			document.getElementById(boxes[i]).style.display = "none";
		}
	}
	
	object.className = "active";
	document.getElementById(boxId).style.display = "block";
	
	return true;
}

function EnableRightForumBox(object, boxId)
{
	if(!object)
	{
		return false;
	}
	
	if(!document.getElementById(boxId))
	{
		return false;
	}
	
	boxes = [
		'forum-theme-list',
		'forum-top-commented',
		'forum-top-rated',
	];
	
	for(var i in boxes)
	{
		if(document.getElementById(boxes[i]))
		{
			document.getElementById('a-' + boxes[i]).className = "";
			document.getElementById(boxes[i]).style.display = "none";
		}
	}
	
	object.className = "active";
	document.getElementById(boxId).style.display = "block";
	
	return true;
}

function Newsletter()
{
	if(document.form_newsletter.name.value == '')
	{
		window.alert("Vyplňte meno!");
		document.form_newsletter.name.focus();
		return false;
	}
	
	if(document.form_newsletter.email.value == '')
	{
		window.alert("Vyplňte email!");
		document.form_newsletter.email.focus();
		return false;
	}
	
	document.form_newsletter.cmd.value = "newsletter";
	document.form_newsletter.submit();
}