| //** jQuery Scroll to Top Control script- (c) Dynamic Drive DHTML code library: http://www.dynamicdrive.com. |
| //** Available/ usage terms at http://www.dynamicdrive.com (March 30th, 09') |
| //** v1.1 (April 7th, 09'): |
| //** 1) Adds ability to scroll to an absolute position (from top of page) or specific element on the page instead. |
| //** 2) Fixes scroll animation not working in Opera. |
| |
| |
| 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="/assets/img/up.png" style="width:51px; height:42px" />', //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() |