perfect-scrollbar/min/perfect-scrollbar.min.js

/* Copyright (c) 2012 HyeonJe Jun (http://github.com/noraesae)
 * Licensed under the MIT License
 */(function(e){e.fn.perfectScrollbar=function(){var t=e(this).addClass("ps-container"),n=e(this).children(),r=e("<div class='ps-scrollbar-x'></div>").appendTo(t),i=e("<div class='ps-scrollbar-y'></div>").appendTo(t),s,o,u,a,f,l,c=parseInt(r.css("bottom")),h,p,d=parseInt(i.css("right")),v=function(){var e=parseInt(p*a/o);t.scrollTop(e),r.css({bottom:c-e})},m=function(){var e=parseInt(l*u/s);t.scrollLeft(e),i.css({right:d-e})},g=function(){s=t.width(),o=t.height(),u=n.width(),a=n.height(),s<u?(f=parseInt(s*s/u),l=parseInt(t.scrollLeft()*s/u)):(f=0,l=0),o<a?(h=parseInt(o*o/a),p=parseInt(t.scrollTop()*o/a)):(h=0,scrollbar_y_left=0),r.css({left:l+t.scrollLeft(),bottom:c-t.scrollTop(),width:f}),i.css({top:p+t.scrollTop(),right:d-t.scrollLeft(),height:h})},y=function(e,n){var i=e+n,o=s-f;i<0?l=0:i>o?l=o:l=i,r.css({left:l+t.scrollLeft()})},b=function(e,n){var r=e+n,s=o-h;r<0?p=0:r>s?p=s:p=r,i.css({top:p+t.scrollTop()})},w=function(){var t,n;r.bind("mousedown.perfect-scroll",function(e){n=e.pageX,t=r.position().left,r.addClass("in-scrolling"),e.stopPropagation(),e.preventDefault()}),e(window).bind("mousemove.perfect-scroll",function(e){r.hasClass("in-scrolling")&&(y(t,e.pageX-n),m(),e.stopPropagation(),e.preventDefault())}),e(window).bind("mouseup.perfect-scroll",function(e){r.hasClass("in-scrolling")&&r.removeClass("in-scrolling")})},E=function(){var t,n;i.bind("mousedown.perfect-scroll",function(e){n=e.pageY,t=i.position().top,i.addClass("in-scrolling"),e.stopPropagation(),e.preventDefault()}),e(window).bind("mousemove.perfect-scroll",function(e){i.hasClass("in-scrolling")&&(b(t,e.pageY-n),v(),e.stopPropagation(),e.preventDefault())}),e(window).bind("mouseup.perfect-scroll",function(e){i.hasClass("in-scrolling")&&i.removeClass("in-scrolling")})},S=function(){t.mousewheel(function(e,n,r,i){t.scrollTop(t.scrollTop()-i*10),t.scrollLeft(t.scrollLeft()+r*10),g(),(a>o||u>s)&&e.preventDefault()})};return g(),w(),E(),t.mousewheel&&S(),t}})(jQuery);