Code:
// ==UserScript==
// @include *depositfiles.com/*
// @include *letitbit.net/*
// @include *uploading.com/*
// @include *mpshare.com/*
// @include *upload.com.ua/*
// ==/UserScript==
var is_load;

document.addEventListener(
  'load',
  function (e) {
    is_load=document.body;
    if( !is_load ) { return; }
    DoHack();
  },
  false
);
setInterval("DoHack()",500);

// **************************************
function DoHack() {
 
  var host=window.location.hostname;

  if (host=='depositfiles.com') DepositHack();
  if (host=='letitbit.net') LetitbitHack();
  if (host=='uploading.com') UploadingHack();
  if (host=='mpshare.com') MpShareHack();
  if (host=='upload.com.ua') UCAHack();

}

// ********************************
function LetitbitHack() {
  var topIfr = document.getElementById('topFrame');
  var mainIfr = document.getElementById('mainFrame');
  if ((topIfr!=null) && (mainIfr!=null)) {
   document.location.href=topIfr.src;
   return;
  }

  var el1=document.getElementById('errt');
  var el2=document.getElementById('links');

  if (el1 && el2) {
    el1.style.display="none";
    el2.style.display='block';

    var mydiv = document.createElement('div');
    mydiv.style.position = 'fixed';
    mydiv.style.top = '100px';
    mydiv.style.left = '0px';
    mydiv.style.color = '#000000';
    mydiv.style.width = '100%';
    document.body.appendChild(mydiv);
    mydiv.innerHTML='Hacked by HACKZONE.RU';

  }
}
// ********************************
function DepositHack() {
  var obj_timer = document.getElementById('download_waiter');
  if (obj_timer) {
    obj_timer.destroy;
    obj_timer.innerHTML='Hacked by HACKZONE.RU';
    var obj_url = document.getElementById('download_url');
    obj_url.style.display='block';
  }
}
// **********************************
function UploadingHack() {
var timeblock = document.getElementById("timeblock");
var linkblock = document.getElementById("linkblock");
timeblock.style.display="none";
linkblock.style.display="block";
linkblock.innerHTML += '
Hacked by HACKZONE.RU';
}
// **********************************
function MpShareHack() {
var downloadbtn = document.getElementById("downloadbtn");
timeout=0;
setInterval("downloadbtn.value='Hacked By HACKZONE.RU';",100);
}
// **********************************
function UCAHack() {
for (i = 0, url = ""; i Hacked by HACKZONE.RU';
}
// *********************************