function showBook( book )
{
	switch( book )
	{
		case "pessoa":
			var w = 637;
			var h = 445;
		break;
		
		case "eenlandschap":
			var w = 682;
			var h = 455;
		break;
	}
	
	var url = 'book.php?book=' + book + '&p=1';
	var bookWin = window.open( url, 'bookWindow', 'width=' + w + ', height=' + h + ', status=0, scrollbars=0, resizable=0' );
}

function toggleImage()
{
	var toggleDiv = getObjectByID( "toggle" );
	
	if( toggleDiv.style.visibility == "hidden" )
	{
		toggleDiv.style.visibility = "visible";
	}
	else
	{
		toggleDiv.style.visibility = "hidden";
	}
}

function getObjectByID( id )
{
	if( document.getElementById )
	{
		var r = document.getElementById( id );
	}
	else if( document.all )
	{
		var r = document.all[id];
	}
	else if( document.layers )
	{
		var r = document.layers[id];
	}
	
	return r;
}