//scroll to top

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="data/up.png" class="gotopimg" />', //HTML for control, which is auto wrapped in DIV w/ ID="topcontrol"
	controlattrs: {offsetx:0, offsety:0}, //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

	//compressed code
	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()})})}}
	$(function() { scrolltotop.init() });