var theObj="";

function toolTip(img,me) {
  theObj=me;
  theObj.onmousemove=updatePos;
  document.getElementById('toolTipBox').innerHTML="<img src='http://altera-bg.com/data/images/top3/big/"+img+"' />";
  document.getElementById('toolTipBox').style.display="block";
  window.onscroll=updatePos;
  updatePos();
}

function updatePos() {
  var ev=arguments[0]?arguments[0]:event;
  var x=ev.clientX;
  var y=ev.clientY;
  diffX=20;
  diffY=-40;
  document.getElementById('toolTipBox').style.top  = y-2+diffY+document.body.scrollTop +"px";
  document.getElementById('toolTipBox').style.left = x-2+diffX+document.body.scrollLeft +"px";
  theObj.onmouseout=hideMe;
}

function hideMe() {
  document.getElementById('toolTipBox').style.display="none";
}