scrll -- animated scroll to an element

bower.json

{
  "name": "scrll",
  "version": "0.5.0",
  "authors": [
    "eyy <etaypere@gmail.com>"
  ],
  "dependencies": {
    "jquery" : "*"
  },
  "description": "animated scroll to an element",
  "main": "jquery.scrll.js",
  "keywords": [
    "scroll"
  ],
  "license": "MIT",
  "homepage": "https://gist.github.com/eyy/5921753",
  "ignore": [
    "**/.*",
    "node_modules",
    "bower_components",
    "test",
    "tests"
  ]
}

jquery.scrll.js

/*
 scrll -- animated scroll to an element
 version 0.5

 like scrollTo, but smaller.

 usage examples:
 $.scrll('#about'[, 1000], callback);
 */

(function($) {
    $.scrll = function(selector, speed, cb) {
        if (!cb && $.isFunction(speed)) {
            cb = speed;
            speed = $.scrll.speed;
        }
        $(document.documentElement).animate({
            scrollTop: $(selector).offset().top + $.scrll.offset
        }, speed, cb);
    };
    $.scrll.speed = 500;
    $.scrll.offset = 0;
})(jQuery);

Works great with Bootstrap Scrollspy.