[removed] onload and onerror called together

Question

I\'m new to JavaScript and therefore confused for the variable scope... I\'m trying to load an image, and replace it with another URL when it doesn\'t exist. I have to do it

Answer 1

You are calling the functions, not assigning!

img.onload = onLoadHandler();
img.onerror = onErrorHandler();

needs to be

img.onload = onLoadHandler;
img.onerror = onErrorHandler;