var window_handle = null;
var test_var = "TEST VARIABLE";

function show_popup(tile_type, tile_name, tile_number) {

	switch (tile_type) {
		case "w":
			file_name = "wall_detail.html";
		case "f":
			file_name = "floor_detail.html";
	}
	window.alert (window_handle);
	if (! window_handle == null) {
		window.alert ("handle null");
		if (! window_handle.closed) {
		window.alert ("handle closed");
			window_handle.close()
		}
	}
	window_handle = window.open(file_name + '?' + tile_name + '&' + tile_number, '', 'screenx=320,left=320,screenY=300,top=300,width=500,height=500,resizable=no,scrollbars=no,toolbar=no,location=no');
	window.alert (window_handle);
	 test_var = "CHANGED";
	window.alert ("NEW VAR VALUE = " + test_var);

}