function checkDiv()
{
	var div = document.getElementById('FirstLevel');
	var arrDiv = div.getElementsByTagName('div');
	
	var count = arrDiv.length;
	
	var obj;
	var check = false;

	for(i = 0; i < count; i++)
	{
		obj = document.getElementById(arrDiv[i].id);
		//alert(obj.id + " " + obj.style.display);
		if (obj.style.display == 'block')
		{
			check = false;
			break;
		}
		else
			check = true;
	}

	if (check)
		document.getElementById(arrDiv[2].id).style.display = 'block';
}