Making Back Button to Move Up like this blog

This time I want to share a tutorial how to build your Back Button to Move Up as this blog. For my friends who are interested please just how to make it:

Log into your blog and login with your id
select the widget HTML code
and enter the following code in it:

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
    <script type="text/javascript" >
    
    /***********************************************
    * Scroll To Top Control script- © Dynamic Drive DHTML code library (www.dynamicdrive.com)
    * Advanced modification by buka-rahasia.blogspot.com
    * This notice MUST stay intact for legal use
    * Visit Project Page at http://www.dynamicdrive.com for full source code
    ***********************************************/
    var scrolltotop={
        setting: {startline:100, scrollto: 0, scrollduration:1000, fadeduration:[500, 200]},
        controlHTML: '<img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi3U15Se0Sdnyo4uF82SLIP2GrfKRkd3FaJ8EdDrnTq3me3Hrl-f7HoayuowjKAZSInv_Ys3X3682rovLueqw2a80St_VtyCcviZ-_zw0p0-T_ER5wymyEWTboBVlop9VHs8b6GeinQqO0/s1600/hb-arrow-up.png" />',
        controlattrs: {offsetx:5, offsety:5},
        anchorkeyword: '#top',
        state: {isvisible:false, shouldvisible:false},
        scrollup:function(){
            if (!this.cssfixedsupport)
                this.$control.css({opacity:0})
            var dest=isNaN(this.setting.scrollto)? this.setting.scrollto : parseInt(this.setting.scrollto)
            if (typeof dest=="string" && jQuery('#'+dest).length==1)
                dest=jQuery('#'+dest).offset().top
            else
                dest=0
            this.$body.animate({scrollTop: dest}, this.setting.scrollduration);
        },
        keepfixed:function(){
            var $window=jQuery(window)
            var controlx=$window.scrollLeft() + $window.width() - this.$control.width() - this.controlattrs.offsetx
            var controly=$window.scrollTop() + $window.height() - this.$control.height() - this.controlattrs.offsety
            this.$control.css({left:controlx+'px', top:controly+'px'})
        },
        togglecontrol:function(){
            var scrolltop=jQuery(window).scrollTop()
            if (!this.cssfixedsupport)
                this.keepfixed()
            this.state.shouldvisible=(scrolltop>=this.setting.startline)? true : false
            if (this.state.shouldvisible && !this.state.isvisible){
                this.$control.stop().animate({opacity:1}, this.setting.fadeduration[0])
                this.state.isvisible=true
            }
            else if (this.state.shouldvisible==false && this.state.isvisible){
                this.$control.stop().animate({opacity:0}, this.setting.fadeduration[1])
                this.state.isvisible=false
            }
        },

        init:function(){
            jQuery(document).ready(function($){
                var mainobj=scrolltotop
                var iebrws=document.all
                mainobj.cssfixedsupport=!iebrws || iebrws && document.compatMode=="CSS1Compat" && window.XMLHttpRequest //not IE or IE7+ browsers in standards mode
                mainobj.$body=(window.opera)? (document.compatMode=="CSS1Compat"? $('html') : $('body')) : $('html,body')
                mainobj.$control=$('<div id="topcontrol">'+mainobj.controlHTML+'</div>')
                    .css({position:mainobj.cssfixedsupport? 'fixed' : 'absolute', bottom:mainobj.controlattrs.offsety, left:mainobj.controlattrs.offsetx, opacity:0, cursor:'pointer'})
                    .attr({title:'Scroll Back to Top'})
                    .click(function(){mainobj.scrollup(); return false})
                    .appendTo('body')
                if (document.all && !window.XMLHttpRequest && mainobj.$control.text()!='') //khusus versi IE6 ke bawah untuk loose check, juga untuk melihat apakah control mengandung teks
                    mainobj.$control.css({width:mainobj.$control.width()}) //IE6- perlu diset witdh yang jelas agar kontainer text terbentuk dengan rapi
                mainobj.togglecontrol()
                $('a[href="' + mainobj.anchorkeyword +'"]').click(function(){
                    mainobj.scrollup()
                    return false
                })
                $(window).bind('scroll resize', function(e){
                    mainobj.togglecontrol()
                })
            })
        }
    }
    scrolltotop.init()
    </script>