// Locate the <div> that we want to hover over
  var div = document.getElementsByTagName(“div”)[0];
  
  // Bind a single function to both the mouseover and mouseout events
  div.onmouseover = div.onmouseout = function(e){
      // Normalize the Event object
      e = e || window.event;
  
      // Toggle the background color of the <div>, depending on the
      // type of mouse event that occurred
      this.style.background = e.type == “mouseover” ? “#EEE” : “#FFF”;
  };