jquery.balls.js

jQuery.fn.balls = function(){
  return this.each(function(){
    var $this = $(this),
        w = $this.width(),
        h = $this.height(),
        max = w > h ? w : h,
        rad = Math.floor(max/2) + "px";
    $this.css({
      "width": max,
      "height": max, 
      "-moz-border-radius": rad,
      "-webkit-border-radius": rad,
      "border-radius": rad,
      "overflow":"hidden"
    });
  });
};

Someone at the office insisted that a balls plugin needed to get made. Well here you go.