title: Random border colours
body: <p>I'm in the middle of theming a tumblr site, and each image posted is contained within a ".photobox" class. Is there a piece of javascript or jQuery i can use to change the "border-color" attribute of ".photobox" in the CSS to a random color - preferably chosen from a list of pre-defined colours? I've found one or two scripts on here but they don't seem to work.</p>