Changing the image source using jQuery

Answer 1

I had the same problem when trying to call re captcha button. After some searching, now the below function works fine in almost all the famous browsers(chrome,Firefox,IE,Edge,...):

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

'theUrl' is used to render new captcha image and can be ignored in your case. The most important point is generating new URL which forces FF and IE to rerender the image.