How do I remove the gray border that surrounds background images?

Question

I\'ve come across an interesting problem in the following line of code:

Answer 1

You can also add a blank image as a place holder:

img.src='data:image/png;base64,R0lGODlhFAAUAIAAAP///wAAACH5BAEAAAAALAAAAAAUABQAAAIRhI+py+0Po5y02ouz3rz7rxUAOw=='

This should do the trick!