(function(o){
  var img = o.getElementById("sign");
  var pop = o.getElementById("signfloat");
  img.onmouseover = function(){
    pop.style.display = "block";
  }
  img.onmouseout = function(){
    pop.style.display = "none";
  }
  img.onmousemove = function(event){
    pop.style.top = ((window.event||event).clientY-15)+"px";
    pop.style.left = ((window.event||event).clientX+15)+"px";
  }
})(document)