What can I do when the javascript is disabled in the browser?

The Smart Slider needs javascript to work, so what you can do is to show an image for example instead of the slider with the help of noscript tags, which only run if the javascript loading is disabled. Go to the post/article or php file, where you put the code of your slider, switch to Text Editor, if you haven't been in that, and write this code under or over it with your slider's id in the place of 1, and change the src of the image.

<img src="http://example.com/exampleimage.png" />