sitelock.light.user.js

// ==UserScript==
// @name sitelock.light
// @author dbqp
// @license GNU GPL
// @version 0.1
// ==/UserScript==

if (getCookie("thissiteblocked")=="true") lock();
window.onmousemove=function(e) {
    if (e.clientX<=10 && e.clientY<=10) {
        var date=new Date();
        if (!window.currenttime) window.currenttime=date.getTime();
        if ((date.getTime()-window.currenttime)>=5000) {
            window.currenttime=false;
            if (getCookie("thissiteblocked")!="true") {
                if (window.pagelocked) {
                    setCookie("thissiteblocked",null);
                    unlock();

                } else {
                    setCookie("thissiteblocked","true");
                    lock();
                }

            } else {
                setCookie("thissiteblocked",null);
                unlock();

            }
        }
    }

}

function lock() {
    window.pagelocked=true;
    window.bodystyle=document.getElementsByTagName("BODY")[0].getAttribute("style");
    window.titletext=document.getElementsByTagName("TITLE")[0].innerHTML;
    document.getElementsByTagName("TITLE")[0].innerHTML="Доступ заблокирован";
    document.getElementsByTagName("BODY")[0].setAttribute("style", "overflow: hidden");
    var screen=document.createElement("div");
    screen.setAttribute("style","display: block; position: absolute; top: 0px; left: 0px; right: 0px; bottom: 0px; background-color: black;z-index: 9999; text-align: center;padding-top: 30%; font-size: 40px; font-family: Verdana; color: #fff; 0px 4px 3px rgba(0,0,0,0.4),0px 8px 13px rgba(0,0,0,0.1),0px 18px 23px rgba(0,0,0,0.1);");
    screen.setAttribute("id","divblockforlock");
    screen.innerHTML="Заблокировано";
    document.querySelector("body").appendChild(screen);
}
function unlock() {
    window.pagelocked=false;
    block=document.getElementById("divblockforlock");
    block.parentNode.removeChild(block);
    document.getElementsByTagName("TITLE")[0].innerHTML=window.titletext;
    document.getElementsByTagName("BODY")[0].setAttribute("style", window.bodystyle);

}
function setCookie (name, value, expires, path, domain, secure) {
      document.cookie=name+"="+escape(value)+"; expires=Sat 31-12-2020";
}
function getCookie(name) {
    var cookie=" "+document.cookie;
    var search=" "+name+"=";
    var setStr=null;
    var offset=0;
    var end=0;
    if (cookie.length>0) {
        offset=cookie.indexOf(search);
        if (offset!=-1) {
            offset+=search.length;
            end=cookie.indexOf(";", offset)
            if (end==-1) end=cookie.length;
            setStr=unescape(cookie.substring(offset, end));
        }
    }
    return(setStr);
}