What parameter needs to be changed so that the smooth scroll up button is located in the center of the page, and not on the right side? Here is the code itself:

<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- Β© Dynamic Drive DHTML code library (www.dynamicdrive.com) * Modified by www.MyBloggerTricks.com * This notice MUST stay intact for legal use * Visit Project Page at http://www.dynamicdrive.com for full source code ***********************************************/ 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 (0=top). setting: {startline:100, scrollto: 0, scrollduration:1000, fadeduration:[500, 100]}, controlHTML: '<img src="https://lh4.googleusercontent.com/-eV_K1uq_pdo/Tn4cpk-TF4I/AAAAAAAABo8/CHlsAWkdT6g/s800/1316886651_top.png" />', //HTML for control, which is auto wrapped in DIV w/ ID="topcontrol" controlattrs: {offsetx:5, offsety:5}, //offset of control relative to right/ bottom 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=$('<div id="topcontrol">'+mainobj.controlHTML+'</div>') .css({position:mainobj.cssfixedsupport? 'fixed' : 'absolute', bottom:mainobj.controlattrs.offsety, right:mainobj.controlattrs.offsetx, opacity:0, cursor:'pointer'}) .attr({title:'Scroll Back to Top'}) .click(function(){mainobj.scrollup(); return false}) .appendTo('body') if (document.all && !window.XMLHttpRequest && mainobj.$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>
  • 3
    Akella missed ... Twice. =. = - knes
  • sorry nizya double poke Like) - Palmervan

3 answers 3

Here is a cross-platform example of positioning the button in the center (including IE):

  <input type="button" onClick="clicked()" id="f5"> // ΠΊΠ½ΠΎΠΏΠΊΠ° <script> function clicked() { el = document.getElementById("f5"); // ΠΏΠΎΠ»ΡƒΡ‡Π°Π΅ΠΌ ΠΊΠ½ΠΎΠΏΠΊΡƒ el.style.position="absolute"; // Π°Π±ΡΠΎΠ»ΡŽΡ‚Π½ΠΎΠ΅ ΠΏΠΎΠ·ΠΈΡ†ΠΈΠΎΠ½ΠΈΡ€ΠΎΠ²Π°Π½ΠΈΠ΅ el.style.left=document.body.clientWidth/2-el.clientWidth/2; // ВычислСния... el.style.top=document.body.clientHeight/2-el.clientHeight/2; } </script> 
     var controlx=$window.scrollLeft() + $window.width() - this.$control.width() - this.controlattrs.offsetx var controly=$window.scrollTop() + $window.height() - this.$control.height() - this.controlattrs.offsety

    Here, if I understand correctly, the parameters of the button are set.

      Here if to use such code:

        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=$('<div id="topcontrol">'+mainobj.controlHTML+'</div>') .css({position:mainobj.cssfixedsupport? 'fixed' : 'absolute', top:mainobj.controlattrs.offsety, right:mainobj.controlattrs.offsetx, opacity:0, cursor:'pointer'}) .attr({title:'Scroll to Top'}) .click(function(){mainobj.scrollup(); return false}) .appendTo('body') if (document.all && !window.XMLHttpRequest && mainobj.$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()

      Then here is the line with the button control itself:

       .css({position:mainobj.cssfixedsupport? 'fixed' : 'absolute', top:mainobj.controlattrs.offsety, right:mainobj.controlattrs.offsetx, opacity:0, cursor:'pointer'})