public/javascript/libs/spin.js
function merge(obj) {
    for (var i=1; i < arguments.length; i++) {
      var def = arguments[i]
      for (var n in def)
        if (obj[n] === undefined) obj[n] = def[n]
    }
    return obj
  }
function merge(obj) {
    for (var i=1; i < arguments.length; i++) {
      var def = arguments[i]
      for (var n in def)
        if (obj[n] === undefined) obj[n] = def[n]
    }
    return obj
  }
Fills in default values.