This plugin is designed to “fight” the broken images on
output HTML code of your pages, which attaches itself to the
onError=”..” events of the images, so if an image fails to
load, this JS snippet is fired. You can customize what actions you want to
perform on the broken images: hide them, style-them, replace them, etc – all
this from the WordPress admin panel.
Seems to do exactly what it was designed to do!