<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js">
    </script>
    <script type='text/javascript' language='Javascript'>
    var scrolltotop={
    //startline: Integer. Number of pixels from top of doc scrollbar is scrolled before showing control
    //scrollto: Keyword (Integer, or "Scroll_to_Element_ID"). How far to scroll document up when control is clicked on (1=top).
    setting: {startline:100, scrollto: 0, scrollduration:1000, fadeduration:[500, 100]},
    controlHTML: '<img src="URL IMG"/>', //HTML for control, which is auto wrapped in DIV w/ ID="topcontrol"
    controlattrs: {offsetx:5, offsety:5}, //offset of control relative to right/ center of window corner
    anchorkeyword: '#top', //Enter href value of HTML anchors on the page that should also act as "Scroll Up" links
    state: {isvisible:false, shouldvisible:false},
    scrollup:function(){
    if (!this.cssfixedsupport) //if control is positioned using JavaScript
    this.$control.css({opacity:0}) //hide control immediately after clicking it
    var dest=isNaN(this.setting.scrollto)? this.setting.scrollto : parseInt(this.setting.scrollto)
    if (typeof dest=="string" && jQuery('#'+dest).length==1) //check element set by string exists
    dest=jQuery('#'+dest).offset().top
    else
    dest=0
    this.$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=$('<div id="topcontrol">'+mainobj.controlHTML+'</div>')
    .css({position:mainobj.cssfixedsupport? 'fixed' : 'absolute', bottom:mainobj.controlattrs.offsety, right:mainobj.controlattrs.offsetx, opacity:0, cursor:'pointer'})
    .attr({title:"Let's Fly High !"})
    .click(function(){mainobj.scrollup(); return false})
    .appendTo('body')
    if (document.all && !window.XMLHttpRequest && mainobj.$control.text()!='') //loose check for IE6 and below, plus whether control contains any text
    mainobj.$control.css({width:mainobj.$control.width()}) //IE6- seems to require an explicit width on a DIV containing text
    mainobj.togglecontrol()
    $('a[href="' + mainobj.anchorkeyword +'"]').click(function(){
    mainobj.scrollup()
    return false
    })
    $(window).bind('scroll resize', function(e){
    mainobj.togglecontrol()
    })
    })
    }
    }
    scrolltotop.init()
    </script>

Labels: tutorial

    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js">
    </script>
    <script type='text/javascript' language='Javascript'>
    var scrolltotop={
    //startline: Integer. Number of pixels from top of doc scrollbar is scrolled before showing control
    //scrollto: Keyword (Integer, or "Scroll_to_Element_ID"). How far to scroll document up when control is clicked on (1=top).
    setting: {startline:100, scrollto: 0, scrollduration:1000, fadeduration:[500, 100]},
    controlHTML: '<img src="URL IMG"/>', //HTML for control, which is auto wrapped in DIV w/ ID="topcontrol"
    controlattrs: {offsetx:5, offsety:5}, //offset of control relative to right/ center of window corner
    anchorkeyword: '#top', //Enter href value of HTML anchors on the page that should also act as "Scroll Up" links
    state: {isvisible:false, shouldvisible:false},
    scrollup:function(){
    if (!this.cssfixedsupport) //if control is positioned using JavaScript
    this.$control.css({opacity:0}) //hide control immediately after clicking it
    var dest=isNaN(this.setting.scrollto)? this.setting.scrollto : parseInt(this.setting.scrollto)
    if (typeof dest=="string" && jQuery('#'+dest).length==1) //check element set by string exists
    dest=jQuery('#'+dest).offset().top
    else
    dest=0
    this.$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=$('<div id="topcontrol">'+mainobj.controlHTML+'</div>')
    .css({position:mainobj.cssfixedsupport? 'fixed' : 'absolute', bottom:mainobj.controlattrs.offsety, right:mainobj.controlattrs.offsetx, opacity:0, cursor:'pointer'})
    .attr({title:"Let's Fly High !"})
    .click(function(){mainobj.scrollup(); return false})
    .appendTo('body')
    if (document.all && !window.XMLHttpRequest && mainobj.$control.text()!='') //loose check for IE6 and below, plus whether control contains any text
    mainobj.$control.css({width:mainobj.$control.width()}) //IE6- seems to require an explicit width on a DIV containing text
    mainobj.togglecontrol()
    $('a[href="' + mainobj.anchorkeyword +'"]').click(function(){
    mainobj.scrollup()
    return false
    })
    $(window).bind('scroll resize', function(e){
    mainobj.togglecontrol()
    })
    })
    }
    }
    scrolltotop.init()
    </script>

Labels: tutorial