var last_target_id = 'default';
function showPlay( target_id )
{

	document.getElementById(last_target_id).style.display = "none";
	document.getElementById( target_id ).style.display = "block";
	
	if(target_id) { last_target_id = target_id; }
	
}


var childWindowObject;
function openWindow(theURL,winName,features)
{
	// close existing open window
	if( childWindowObject )
		childWindowObject.close();
		
	// open new window
	childWindowObject = window.open( theURL, winName, features );
	
	// and finally, give it focus for good measure
	childWindowObject.focus();
}