https://www.vfu.bg/includes/libs/jquery/jquery.ui.totop.js

1(function($){
2	$.fn.UItoTop = function(options) {
3
4 		var defaults = {
5			text: '',
6			min: 200,			
7			scrollSpeed: 800,
8  			containerID: 'toTop',
9			containerHoverID: 'toTopHover',
10			easingType: 'linear',
11			min_width:parseInt($('body').css("min-width"),10),
12			main_width:parseInt($('body').css("min-width"),10)/2
13					
14 		};
15
16 		var settings = $.extend(defaults, options);
17		var containerIDhash = '#' + settings.containerID;
18		var containerHoverIDHash = '#'+settings.containerHoverID;
19			
20		$('body').append('<a href="#" id="'+settings.containerID+'">'+settings.text+'</a>');
21		
22		var button_width = parseInt($(containerIDhash).css("width"))+90
23		var button_width_1 = parseInt($(containerIDhash).css("width"))+20
24		var max_width = defaults.min_width+button_width;
25		var margin_right_1 = -(defaults.main_width+button_width_1)
26		var margin_right_2 = -(defaults.main_width-20)
27		
28		function top(){
29			if(($(window).width()<=max_width)&&($(window).width()>=defaults.min_width))$(containerIDhash).stop().animate({marginRight:margin_right_2,right:'50%'})
30			else if($(window).width()<=defaults.min_width)$(containerIDhash).stop().css({marginRight:0,right:10})
31			else $(containerIDhash).stop().animate({marginRight:margin_right_1,right:'50%'})
32		}
33		top()
34		$(containerIDhash).hide().click(function(){			
35			$('html, body').stop().animate({scrollTop:0}, settings.scrollSpeed, settings.easingType);
36			$('#'+settings.containerHoverID, this).stop().animate({'opacity': 0 }, settings.inDelay, settings.easingType);
37			return false;
38		})
39		
40		.prepend('<span id="'+settings.containerHoverID+'"></span>')
41		.hover(function() {
42				$(containerHoverIDHash, this).stop().animate({
43					'opacity': 1
44				}, 600, 'linear');
45			}, function() { 
46				$(containerHoverIDHash, this).stop().animate({
47					'opacity': 0
48				}, 700, 'linear');
49			});
50								
51		$(window).scroll(function() {
52			var sd = $(window).scrollTop();
53			if(typeof document.body.style.maxHeight === "undefined") {
54				$(containerIDhash).css({
55					'position': 'absolute',
56					'top': $(window).scrollTop() + $(window).height() - 50
57				});
58			}
59			if ( sd > settings.min ) 
60				$(containerIDhash).css({display: 'block'});
61			else 
62				$(containerIDhash).css({display: 'none'});
63		});
64		$(window).resize(function(){top()})
65};
66})(jQuery);
67
68$(window).load(function(){$().UItoTop({easingType: 'easeOutQuart'});})