jquery-scrollable.js

/**
	http://jsperf.com/jquery-scrollable/2
    Revision 1: published by Brian on 23rd May 2011 and last updated on 24th May 2011
    Revision 2: published on 26th March 2012
*/
(function($) {
		$.extend($.expr[":"], {
				scrollable: function(element) {
					var vertically_scrollable, horizontally_scrollable;
					if ($(element).css('overflow') == 'scroll' || $(element).css('overflowX') == 'scroll' || $(element).css('overflowY') == 'scroll') return true;

					vertically_scrollable = (element.clientHeight < element.scrollHeight) && (
						$.inArray($(element).css('overflowY'), ['scroll', 'auto']) != -1 || $.inArray($(element).css('overflow'), ['scroll', 'auto']) != -1);

					if (vertically_scrollable) return true;

					horizontally_scrollable = (element.clientWidth < element.scrollWidth) && (
						$.inArray($(element).css('overflowX'), ['scroll', 'auto']) != -1 || $.inArray($(element).css('overflow'), ['scroll', 'auto']) != -1);
					return horizontally_scrollable;
				}
			});
	})(jQuery);
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