source: aowow/templates/wowhead/css/Mapper_ie6.css

.mapper .pin a
{
        background:none;
        filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='templates/wowhead/images/map-pin-yellow.png');
}

.mapper .pin-1 a
{
        filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='templates/wowhead/images/map-pin-green.png');
}

.mapper .pin-2 a
{
        filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='templates/wowhead/images/map-pin-red.png');
}

.mapper .pin-3 a
{
        filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='templates/wowhead/images/map-pin-blue.png');
}

.mapper .pin-4 a
{
        filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='templates/wowhead/images/map-pin-purple.png');
}