//** 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="/gfx_tt/script/up.png" style="width:33px; height:44px" />', //HTML for control, which is auto wrapped in DIV w/ ID="topcontrol"
 	controlattrs: {offsetx:1, 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()