how to clear or replace a cached image

Question

I know there are many ways to prevent image caching (such as via META tags), as well as a few nice tricks to ensure that the current version of an image is shown with every

Answer 1

I usually do the same as @Greg told us, and I have a function for that:

function addMagicRefresh(url)
{
    var symbol = url.indexOf('?') == -1 ? '?' : '&';
    var magic = Math.random()*999999;
    return url + symbol + 'magic=' + magic;
}

This will work since your server accepts it and you don't use the "magic" parameter any other way.

I hope it helps.