Copy/Paste Clipboard Protection Query

maximus@nsimail.com) w/ mods by DynamicDrive
//For full source code, visit http://www.dynamicdrive.com

var message="Function Disabled!";

///////////////////////////////////
function clickIE4(){
if (event.button==2){
alert(message);
return false;
}
}

function clickNS4(e){
if (document.layers||document.getElementById&&!document.all){
if (e.which==2||e.which==3){
alert(message);
return false;
}
}
}

if (document.layers){
document.captureEvents(Event.MOUSEDOWN);
document.onmousedown=clickNS4;
}
else if (document.all&&!document.getElementById){
document.onmousedown=clickIE4;
}

document.oncontextmenu=new Function("alert(message);return false")

// -->

I found this. Other than "basically useless" what think ye?

I am essentially wanting to protect that book I've been writing I mentioned on the "Ethics" thread. I would tend to think the average person who is simply an author would not be writing HTML script. I would tend to think the average HTML thief would not be interested in stealing a sci-fi novel. Naturally, come "buy button" time, I'll have copyrighted at the USPatent Office the entire set of works (It's 3 books and I'll likely change the final title), still in the meantime, while I solicit review, a little embedded protection would be a benefit.