function changeShow()
{
	var t = document.getElementById("tieba");

	var m = document.getElementById("microblog");

	if( t.style.display != "block" )
	{
		m.style.display = "none";

		t.style.display = "block";
	}
	else
	{
		t.style.display = "none";

		m.style.display = "block";
	}

	setTimeout(changeShow,5000);
}

changeShow();