function showspot(x, y)
{
    var map = document.getElementById("imgmap");
    var left = map.offsetLeft + x - 14;
    var top = map.offsetTop + y - 14;
    var spot = document.getElementById("spot");
    spot.style.visibility = "visible";
    spot.style.left = left + "px";
    spot.style.top = top + "px";
    spot.innerHTML = "<img src='/images/icon/spot.gif' width='15px' height='15px'>";
}

function hidespot()
{
   var spot = document.getElementById("spot");
   spot.style.visibility = "hidden";
}