So. I wasn't sure where to find this out, but what kind of coding is allowed here?

Obviously HTML is. But how about CSS? Javascript? Thanks, guys.

yes to html, css and javascript.

free hosting accounts are limited to the following file types:
.htm, .html, .shtml, .gif, .jpg, .png, .txt, .swf, .mid, .rmi, .au, .wav, .js, .css, .ico, .bmp, .class, .dcr

paid hosting allows pretty much everything else above that.

Alright. Thank you very much, that helped greatly. ^^