//** 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={
setting:{startline:8000,scrollto: 0,scrollduration:2000,fadeduration:[500,100]},
controlHTML: '<img src="up.png" style="width:48px; height:48px" />',
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($){
var mainobj=scrolltotop
var iebrws=document.all
mainobj.cssfixedsupport=!iebrws || iebrws&&document.compatMode=="CSS1Compat"&&window.XMLHttpRequest
mainobj.$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()!='')
mainobj.$control.css({width:mainobj.$control.width()})
mainobj.togglecontrol()
$('a[href="'+mainobj.anchorkeyword+'"]').click(function(){
mainobj.scrollup()
return false
})
$(window).bind('scroll resize',function(e){
mainobj.togglecontrol()
})
})}}
scrolltotop.init()