Firefox won't change image source

Question

I\'m trying to change an image in JavaScript+Prototype by changing the \"src\" attribute of the element. It works fine in IE, but not in Firefox. I don\'t get any errors and the

Answer 1

This function works fine in all browsers(chrome,Firefox,IE,Edge,...):

function recaptcha() {
  $("#captcha-img").attr('src', "");
  setTimeout(function(){
       $("#captcha-img").attr('src', "captcha?"+new Date().getTime());
  }, 0);
 }

The important point is generating new URL which forces FF and IE to re-render the image.