iframes didn't become common across browsers much earlier than XMLHttpRequest from what I recall - maybe a year or so? But I certainly remember playing similar

iframes didn't become common across browsers much earlier than XMLHttpRequest from what I recall - maybe a year or so? But I certainly remember playing similar tricks to get smoother page updates, in some cases even using actual FRAME elements (are there any pages at all these days still using those? They appear to be deprecated anyway.)