$(function() {
        //scrollpane parts
        var scrollPane = $( ".scroll-pane" ),
            scrollContent = $( ".scroll-content" );
        
        //build slider
        var scrollbar = $( ".scroll-bar" ).slider({
            slide: function( event, ui ) {
                if ( scrollContent.width() > scrollPane.width() ) {
                    scrollContent.css( "margin-left", Math.round(
                        ui.value / 100 * ( scrollPane.width() - scrollContent.width() )
                    ) + "px" );
                } else {
                    scrollContent.css( "margin-left", 0 );
                }
            }
        });
        
        //append icon to handle
        var handleHelper = scrollbar.find( ".ui-slider-handle" )
        .mousedown(function() {
            scrollbar.width( handleHelper.width() );
        })
        .mouseup(function() {
            scrollbar.width( "100%" );
        })
        .append( "<span class='ui-icon ui-icon-grip-dotted-vertical'></span>" )
        .wrap( "<div class='ui-handle-helper-parent'></div>" ).parent();
        
        //change overflow to hidden now that slider handles the scrolling
        scrollPane.css( "overflow", "hidden" );
        
        //size scrollbar and handle proportionally to scroll distance
        function sizeScrollbar() {
            var remainder = scrollContent.width() - scrollPane.width();
            var proportion = remainder / scrollContent.width();
            var handleSize = scrollPane.width() - ( proportion * scrollPane.width() );
            scrollbar.find( ".ui-slider-handle" ).css({
                width: handleSize,
                "margin-left": -handleSize / 2
            });
            handleHelper.width( "" ).width( scrollbar.width() - handleSize );
        }
        
        //reset slider value based on scroll content position
        function resetValue() {
            var remainder = scrollPane.width() - scrollContent.width();
            var leftVal = scrollContent.css( "margin-left" ) === "auto" ? 0 :
                parseInt( scrollContent.css( "margin-left" ) );
            var percentage = Math.round( leftVal / remainder * 100 );
            scrollbar.slider( "value", percentage );
        }
        
        //if the slider is 100% and window gets larger, reveal content
        function reflowContent() {
                var showing = scrollContent.width() + parseInt( scrollContent.css( "margin-left" ), 10 );
                var gap = scrollPane.width() - showing;
                if ( gap > 0 ) {
                    scrollContent.css( "margin-left", parseInt( scrollContent.css( "margin-left" ), 10 ) + gap );
                }
        }
        
        //change handle position on window resize
        $( window ).resize(function() {
            resetValue();
            sizeScrollbar();
            reflowContent();
        });
        //init scrollbar size
        setTimeout( sizeScrollbar, 10 );//safari wants a timeout
    });