function openPopupDiv( _element ) {
	var _popup = document.getElementById( _element );
	_popup.style.visibility = "visible";
	_popup.style.display = "inline";
}

function closePopupDiv( _element ) {
	var _popup = document.getElementById( _element );
	_popup.style.visibility = "hidden";
	_popup.style.display = "none";
}

function launchTrendTracker() {
	var url = "twitter.htm";
	var windowName = "trendTracker";
	window.open( url, windowName, 'width=300,height=600,scrollbar=yes,resizable=no,toolbar=no,status=no,screenX=40,screenY=40,left=40,top=40' );
}