[whalesalad]

Or we could go one step further and replace images with unicode characters: ▲ + ▼

    ▲ - U+25B2 BLACK UP-POINTING TRIANGLE
    ▼ - U+25BC BLACK DOWN-POINTING TRIANGLE

[VMG]

Just please either don't put them right next to each other or make the vote reversible. I've often accidentally hit the wrong arrow.

[briandear]

So YOU'RE the person downvoting my brilliance! ;)

[vhf]

Like this : http://jsbin.com/ewufof/21/