$(document).ready(function(){
	
		var paneWidth = $(".scroll-content-item").length * $(".scroll-content-item").width() + $(".scroll-content-item").length * 10 * 2;
		
		$( ".scroll-content" ).width(paneWidth);
		
		//scrollpane parts
		var scrollPane = $( ".scroll-pane" ),
			scrollContent = $( ".scroll-content" );
		
		if (scrollPane.width() < paneWidth) {
		
			//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
		
		}
		
	});