Uploading image directory to server

hi all,
I’m a beginner html/css coder. I have already designed my index file and uploaded it to the DH server.

Now, I’m making up a menu of buttons for the web page. I can’t seem to get my code to “point” to the image in the image directory. I’m not sure if a) I’m doing the code right or b) if I uploaded the image directory incorrectly.

any tips would be helpful.

any code sample or link would be helpful… without either one we have no idea what the problem is.