var i = 0;
function unhide(elem1, elem2, elem3, elem4){
	document.getElementById(elem1).style.display = 'block';
	document.getElementById(elem2).style.display = 'none';
	if (i==0){
	document.getElementById('inactive').id = 'active';
	document.getElementById('active').id ='inactive';
	i = 1;
	}
	else
	{
	document.getElementById('active').id ='inactive';
	document.getElementById('inactive').id = 'active';
	i = 0;
	}
	}