function view_hotspot(el)
{
    //console.log("active_id = ", active_id);
    content_el = document.getElementById("content_" + el.id);
    content_el.style.top = (el.offsetTop - 50) + "px";
    if (el.offsetLeft < 300)
        content_el.style.left = (el.offsetLeft + 75 ) + "px";
    else
        content_el.style.left = (el.offsetLeft - 280 ) + "px";
    content_el.style.display = "block";
}
function hide_hotspot(el)
{
    content_el = document.getElementById("content_" + el.id);
    content_el.style.display = "none";
}