var scrolltotop={setting:{startline:100,scrollto:0,scrollduration:1e3,fadeduration:[500,100]},controlHTML:'<i class="fa fa-angle-up"></i>',controlattrs:{offsetx:5,offsety:5},anchorkeyword:"#top",state:{isvisible:!1,shouldvisible:!1},scrollup:function(){this.cssfixedsupport||this.$control.css({opacity:0});var a=isNaN(this.setting.scrollto)?this.setting.scrollto:parseInt(this.setting.scrollto);a="string"==typeof a&&1==jQuery("#"+a).length?jQuery("#"+a).offset().top:0,this.$body.animate({scrollTop:a},this.setting.scrollduration)},keepfixed:function(){var a=jQuery(window),b=a.scrollLeft()+a.width()-this.$control.width()-this.controlattrs.offsetx,c=a.scrollTop()+a.height()-this.$control.height()-this.controlattrs.offsety;"rtl"===jQuery("html").attr("dir")?this.$control.css({right:b+"px"}):this.$control.css({left:b+"px"}),this.$control.css({top:c+"px"})},togglecontrol:function(){var a=jQuery(window).scrollTop();this.cssfixedsupport||this.keepfixed(),this.state.shouldvisible=a>=this.setting.startline,this.state.shouldvisible&&!this.state.isvisible?(this.$control.stop().animate({opacity:1},this.setting.fadeduration[0]),this.state.isvisible=!0):0==this.state.shouldvisible&&this.state.isvisible&&(this.$control.stop().animate({opacity:0},this.setting.fadeduration[1]),this.state.isvisible=!1)},init:function(){jQuery(document).ready(function(a){var b=scrolltotop,c=document.all;b.cssfixedsupport=!c||c&&"CSS1Compat"==document.compatMode&&window.XMLHttpRequest,b.$body=a(window.opera?"CSS1Compat"==document.compatMode?"html":"body":"html,body"),b.$control=a('<div id="topcontrol">'+b.controlHTML+"</div>").css({position:b.cssfixedsupport?"fixed":"absolute",bottom:b.controlattrs.offsety,right:"rtl"===a("html").attr("dir")?"auto":b.controlattrs.offsetx,left:"rtl"===a("html").attr("dir")?b.controlattrs.offsetx:"auto",opacity:0,cursor:"pointer"}).attr({title:"Scroll Back to Top"}).click(function(){return b.scrollup(),!1}).appendTo("body"),document.all&&!window.XMLHttpRequest&&""!=b.$control.text()&&b.$control.css({width:b.$control.width()}),b.togglecontrol(),a('a[href="'+b.anchorkeyword+'"]').click(function(){return b.scrollup(),!1}),a(window).bind("scroll resize",function(a){b.togglecontrol()})})}};scrolltotop.init();