JS to block selecting text on a site.

block.js

//courtesy of BoogieJack.com
function killCopy(e) {
    return false;
}

function reEnable() {
    return true;
}

document.onselectstart = new Function ("return false")
if (window.sidebar) {
    document.onmousedown=killCopy;
    document.onclick=reEnable;
}