function initPage()
{
  document.onmouseover = document_onmouseover;
  document.onmouseout = document_onmouseout;
  document.onclick = document_onclick;
}

function document_onmouseover(eventObject)
{
  var eventSourceElement = getEventSourceElement(eventObject);
  if (eventSourceElement != null && eventSourceElement.tagName.toLowerCase() == "img")
  {
    eventSourceElement.style.borderColor = "blue"; 
  }
}

function getEventSourceElement(eventObject)
{
   var eventSourceElement;
   if (eventObject == null)
   {
      eventSourceElement = window.event.srcElement;
   }
   else
   {
      eventSourceElement = eventObject.target;
   }
   return eventSourceElement;
}

function document_onmouseout(eventObject)
{
   var eventSourceElement = getEventSourceElement(eventObject);
   if (eventSourceElement != null && eventSourceElement.tagName.toLowerCase() == "img")
   {
      eventSourceElement.style.borderColor = "gray";
   }
}

function document_onclick(eventObject)
{
  
}