isTooltipInsideViewport = function (bound, viewportBound, tooltipBound) {
  if (bound === 'top' || bound === 'left') {
    return viewportBound <= tooltipBound;
  }

  if (bound === 'right' || bound === 'bottom') {
    return viewportBound >= tooltipBound;
  }
}
Tipsy tooltip view.

 - Needs an element to work.
 - Inits tipsy library.
 - Clean bastard tipsy bindings easily.