what do u mean by "cant be downloaded"?
theoretically, u can copy
any page... i can show u how
you can protect urself a bit by disabling the right click mouse (unable to do "save as.." then), or disabling left click (cant copy text), but that doesnt work in all the browsers, and there are always many easy ways to copy any site...
better write your copyright statement and check in
www.copyscape.com if u were copied.. if that is what i meant