Hello. Hope I have this figured out.
I placed all relevant files in the attached zip file. I believe the main thing is the menu.js file, specifically the function: addButton(name). That is where the issue is to be found. But better too much information rather than too little. The actual site is on my desk top server so I am afraid that you cannot access it.
Basically this function opens an image upload window. The point is to send an image to the server and then display it on the html page. The button, button_three should become active when an image is loaded. Pressing the button will then place the image in the proper sever file. I have in mind to disable the button in the event of an error.
Hope this makes sense.
Thank you for taking a look. By the way, the next day or so I will be traveling so looking at the forum will be kind of hit or miss.