var tooltips = new Array();

function showTip(msgid) {
  var tooltip = document.getElementById('tipDiv');
  tooltip.innerHTML = tooltips[msgid];
  tooltip.style.display = 'block';
  document.body.style.cursor = 'pointer'
}

function hideTip() {
  var tooltip = document.getElementById('tipDiv');
  tooltip.innerHTML = '';
  tooltip.style.display = 'none';
  document.body.style.cursor = 'auto'  
}

function trackTip(evt) {
  var tooltip = document.getElementById('tipDiv');
  tooltip.style.left = (evt ? evt.pageX : (window.event.clientX + document.body.scrollLeft)) + "px";
  tooltip.style.top  = (evt ? evt.pageY : (window.event.clientY + document.body.scrollTop)) + "px";
}

document.onmousemove = trackTip;
window.onmousemove = trackTip;