http://www.vendome-filmfest.com/wp-content/themes/Unicorn/js/scrolltopcontrol.js?ver=1

1var scrolltotop={
2	//startline: Integer. Number of pixels from top of doc scrollbar is scrolled before showing control
3	//scrollto: Keyword (Integer, or "Scroll_to_Element_ID"). How far to scroll document up when control is clicked on (0=top).
4	setting: {startline:100, scrollto: 0, scrollduration:1000, fadeduration:[500, 100]},
5	controlHTML: '<div class="scrolltop"></div>', //HTML for control, which is auto wrapped in DIV w/ ID="topcontrol"
6	controlattrs: {offsetx:63, offsety:10}, //offset of control relative to right/ bottom of window corner
7	anchorkeyword: '#top', //Enter href value of HTML anchors on the page that should also act as "Scroll Up" links
8
9	state: {isvisible:false, shouldvisible:false},
10
11	scrollup:function(){
12		if (!this.cssfixedsupport) //if control is positioned using JavaScript
13			this.$control.css({opacity:0}) //hide control immediately after clicking it
14		var dest=isNaN(this.setting.scrollto)? this.setting.scrollto : parseInt(this.setting.scrollto)
15		if (typeof dest=="string" && jQuery('#'+dest).length==1) //check element set by string exists
16			dest=jQuery('#'+dest).offset().top
17		else
18			dest=0
19		this.$body.animate({scrollTop: dest}, this.setting.scrollduration);
20	},
21
22	keepfixed:function(){
23		var $window=jQuery(window)
24		var controlx=$window.scrollLeft() + $window.width() - this.$control.width() - this.controlattrs.offsetx
25		var controly=$window.scrollTop() + $window.height() - this.$control.height() - this.controlattrs.offsety
26		this.$control.css({left:controlx+'px', top:controly+'px'})
27	},
28
29	togglecontrol:function(){
30		var scrolltop=jQuery(window).scrollTop()
31		if (!this.cssfixedsupport)
32			this.keepfixed()
33		this.state.shouldvisible=(scrolltop>=this.setting.startline)? true : false
34		if (this.state.shouldvisible && !this.state.isvisible){
35			this.$control.stop().animate({opacity:1}, this.setting.fadeduration[0])
36			this.state.isvisible=true
37		}
38		else if (this.state.shouldvisible==false && this.state.isvisible){
39			this.$control.stop().animate({opacity:0}

39, this.setting.fadeduration[1])
40			this.state.isvisible=false
41		}
42	},
43	
44	init:function(){
45		jQuery(document).ready(function($){
46			var mainobj=scrolltotop
47			var iebrws=document.all
48			mainobj.cssfixedsupport=!iebrws || iebrws && document.compatMode=="CSS1Compat" && window.XMLHttpRequest //not IE or IE7+ browsers in standards mode
49			mainobj.$body=(window.opera)? (document.compatMode=="CSS1Compat"? $('html') : $('body')) : $('html,body')
50			mainobj.$control=$('<div id="topcontrol">'+mainobj.controlHTML+'</div>')
51				.css({position:mainobj.cssfixedsupport? 'fixed' : 'absolute', bottom:mainobj.controlattrs.offsety, right:mainobj.controlattrs.offsetx, opacity:0, cursor:'pointer'})
52				.attr({title:'Scroll Back to Top'})
53				.click(function(){mainobj.scrollup(); return false})
54				.appendTo('body')
55			if (document.all && !window.XMLHttpRequest && mainobj.$control.text()!='') //loose check for IE6 and below, plus whether control contains any text
56				mainobj.$control.css({width:mainobj.$control.width()}) //IE6- seems to require an explicit width on a DIV containing text
57			mainobj.togglecontrol()
58			$('a[href="' + mainobj.anchorkeyword +'"]').click(function(){
59				mainobj.scrollup()
60				return false
61			})
62			$(window).bind('scroll resize', function(e){
63				mainobj.togglecontrol()
64			})
65		})
66	}
67}
68
69scrolltotop.init()