function messageLoad(el) {
  var wch=Math.floor(Math.random()*el+1);
  document.getElementById('rotate'+wch).style.display='block';
}

function messageLoad_sc(el) {
  var wch_sc=Math.floor(Math.random()*el+1);
  document.getElementById('rotate_sc'+wch_sc).style.display='block';
}

function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}


/*
var time = 20;
var currentBlock = 0;
var color = 255;
time = time*1000;

function rotation(el) {
    currentBlock++;
    if (currentBlock == el + 1) {
        currentBlock = 1;
    }

    if (currentBlock == 1) {
        prevBlock = el;
    }
    else {
        prevBlock = currentBlock - 1;
    }

    var hide = document.getElementById('rotate'+prevBlock);
    hide.style.display = 'none';


    var show = document.getElementById('rotate'+currentBlock);
    show.style.display = 'block';

    setTimeout('rotation('+el+')', time);
}*/