https://amfostacolo.ro/js/totop_arrow79.js

1/***********************************************
2* Scroll To Top Control script- � Dynamic Drive DHTML code library (www.dynamicdrive.com)
3* Modified by www.MyBloggerTricks.com
4* Modified by www.scrolltotop.com
5* This notice MUST stay intact for legal use
6* Visit Project Page at http://www.dynamicdrive.com for full source code
7***********************************************/
8
9
10var scrolltotop={
11
12    //startline: Integer. Number of pixels from top of doc scrollbar is scrolled before showing control
13
14    //scrollto: Keyword (Integer, or "Scroll_to_Element_ID"). How far to scroll document up when control is clicked on (0=top).
15
16    setting: {startline:100, scrollto: 0, scrollduration:1000, fadeduration:[500, 100]},
17
18    controlHTML: '<img src="/css/images/arrow79.png" />', //HTML for control, which is auto wrapped in DIV w/ ID="topcontrol"
19
20    controlattrs: {offsetx:5, offsety:55}, //offset of control relative to right/ bottom of window corner
21
22    anchorkeyword: '#top', //Enter href value of HTML anchors on the page that should also act as "Scroll Up" links
23
24 state: {isvisible:false, shouldvisible:false},
25
26
27    scrollup:function(){
28
29        if (!this.cssfixedsupport) //if control is positioned using JavaScript
30
31            this.$control.css({opacity:0}) //hide control immediately after clicking it
32
33        var dest=isNaN(this.setting.scrollto)? this.setting.scrollto : parseInt(this.setting.scrollto)
34
35        if (typeof dest=="string" && jQuery('#'+dest).length==1) //check element set by string exists
36
37            dest=jQuery('#'+dest).offset().top
38
39        else
40
41            dest=0
42
43        this.$body.animate({scrollTop: dest}, this.setting.scrollduration);
44
45    },
46
47
48    keepfixed:function(){
49
50        var $window=jQuery(window)
51
52        var controlx=$window.scrollLeft() + $window.width() - this.$control.width() - this.controlattrs.offsetx
53
54        var controly=$window.scrollTop() + $window.height() - this.$control.height() - this.controlattrs.offsety
55
56        this.$control.css({left:controlx+'px', top:controly+'px'})
57
58    },
59
60
61    togglecontrol:function(){
62
63
64
65        var scrolltop=jQuery(window).scrollTop()
66
67        if (!this.cssfixedsupport)
68
69            this.keepfixed()
70
71        this.state.shouldvisible=(scrolltop>=this.setting.startline)? true : false
72
73        if (this.state.shouldvisible && !this.state.isvisible){
74
75            this.$control.stop().animate({opacity:1}, this.setting.fadeduration[0])
76
77            this.state.isvisible=true
78
79        }
80
81        else if (this.state.shouldvisible==false && this.state.isvisible){
82
83            this.$control.stop().animate({opacity:0}

83, this.setting.fadeduration[1])
84
85            this.state.isvisible=false
86
87        }
88    },
89   
90    init:function(){
91        jQuery(document).ready(function($){
92            var mainobj=scrolltotop
93            var iebrws=document.all
94            mainobj.cssfixedsupport=!iebrws || iebrws && document.compatMode=="CSS1Compat" && window.XMLHttpRequest //not IE or IE7+ browsers in standards mode
95            mainobj.$body=(window.opera)? (document.compatMode=="CSS1Compat"? $('html') : $('body')) : $('html,body')
96            mainobj.$control=$('<div id="topcontrol">'+mainobj.controlHTML+'</div>')
97                .css({position:mainobj.cssfixedsupport? 'fixed' : 'absolute', bottom:mainobj.controlattrs.offsety, right:mainobj.controlattrs.offsetx, opacity:0, cursor:'pointer'})
98                .attr({title:'Scroll to Top'})
99                .click(function(){mainobj.scrollup(); return false})
100                .appendTo('body')
101            if (document.all && !window.XMLHttpRequest && mainobj.$control.text()!='') //loose check for IE6 and below, plus whether control contains any text
102                mainobj.$control.css({width:mainobj.$control.width()}) //IE6- seems to require an explicit width on a DIV containing text
103            mainobj.togglecontrol()
104
105$('a[href="' + mainobj.anchorkeyword +'"]').click(function(){
106                mainobj.scrollup()
107                return false
108            })
109            $(window).bind('scroll resize', function(e){
110                mainobj.togglecontrol()
111            })
112        })
113    }
114}
115scrolltotop.init()