function cloud(e,v,txt){
    var t=document.createElement("div");
    t.className="chmurka";
    t.innerHTML=txt;
    v.move=function(e){
      e=e||event;
      t.style.left=e.clientX + document.body.scrollLeft+"px";
      t.style.top=e.clientY + document.body.scrollTop+"px";
    }
    v.move(e);
    document.body.appendChild(t);
    v.onmousemove=function(e){v.move(e)}
    v.onmouseout=function(e){
      document.body.removeChild(t);
    }
}