eels and escalators

.self .down { background: url(%%eel-esc%%) no-repeat 0 -20px; }
.self .up { background: url(%%eel-esc%%) no-repeat 0 -40px; }
.self .downmod { background: url(%%eel-esc%%) no-repeat 0 0; }
.self .upmod { background: url(%%eel-esc%%) no-repeat 0 -60px; }