var dom = (document.getElementById) ? true : false;
var ns5 = ((navigator.userAgent.indexOf("Gecko")>-1) && dom) ? true: false;
var ns4 = (document.layers && !dom) ? true : false;
var ie5 = ((navigator.userAgent.indexOf("MSIE")>-1) && dom) ? true : false;
var ie4 = (document.all && !dom) ? true : false;

function showIt(evt, index) {
  l = document.getElementById("zone" + index);
  mouseX = (ns4||ns5)? evt.pageX: window.event.clientX + document.body.scrollLeft;
  mouseY = (ns4||ns5)? evt.pageY: window.event.clientY + document.body.scrollTop;
  h = l.style.height;
  h = h.substr(0, h.indexOf("px"));
  l.style.top = mouseY - h - 1;
  l.style.left = mouseX - 220 ;
  l.style.visibility = "visible";
  //alert("l.style.height = " + l.style.height + " \n h = " + h);
}