This website uses 'javascript' (a method of web page progamming), has some 'Flash' animation plus some other minor 'tricks'.

If your browser is set to block these or simply isn't set up to deal with them, blank spaces or error messages might replace some of my pop-ups and my animated 'carousel'.

The 'Options' or 'Tools' or 'Settings' or 'Preferences', (or similar), can adjust this behaviour in relatively 'modern' browsers.
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A brief technical note

JavaScript, Flash &c