function ShowImage(n,t)
{
    sc_width = screen.width;
    sc_height = screen.height;
    left_pos = 10;
    top_pos = 10;
    photo = window.open('image_viewer.htm?image='+n+'&type='+t,'image','width=520,height=570,top='+top_pos+',left='+left_pos+',status=yes');
    photo.focus();
}