MediaWiki:TopAndDownButtons2.js

(function ( $ ) {	$.fn.totopscroller = function(options) {		var defaults = {			showToBottom: true,			showToPrev: true,			link: false,			linkTarget: '_self',			toTopHtml: '',			toBottomHtml: '',			toPrevHtml: '',			linkHtml: '',			toTopClass: 'totopscroller-top',			toBottomClass: 'totopscroller-bottom',			toPrevClass: 'totopscroller-prev',			linkClass: 'totopscroller-lnk',       };		var settings = $.extend({}, defaults, options);		var lastposition = 0;		var wrapper = this,            b_top = null,            b_bottom = null,            b_prev = null,			b_link = null,			b_wrapper = null;		var init = function {			b_wrapper = $('  ');			if (settings.showToBottom)			{				b_bottom = $(settings.toBottomHtml);				b_bottom.hide;				b_bottom.addClass(settings.toBottomClass);				b_bottom.appendTo(b_wrapper);			}			if (settings.showToPrev) {				b_prev = $(settings.toPrevHtml); b_prev.hide; b_prev.addClass(settings.toPrevClass); b_prev.appendTo(b_wrapper); }			b_top = $(settings.toTopHtml); b_top.hide; b_top.addClass(settings.toTopClass); b_top.appendTo(wrapper); if (settings.link) {				b_link = $(settings.linkHtml); b_link.attr("target", settings.linkTarget); b_link.attr("href", settings.link); b_link.addClass(settings.linkClass); b_link.appendTo(wrapper); }			b_wrapper.appendTo(wrapper); b_top.click(function(e) {				e.preventDefault;				lastposition = $(document).scrollTop;				$('html, body').animate({scrollTop:0}, {					duration: 'slow', complete: function { refresh; }				});			});			if (settings.showToBottom) {				b_bottom.click(function(e) {					e.preventDefault;					lastposition = 0					$('html, body').animate({scrollTop:$(document).height}, {						duration: 'slow', complete: function { refresh; }					});				});			}			if (settings.showToPrev) {				b_prev.click(function(e) {					e.preventDefault;						$('html, body').animate({scrollTop:lastposition}, {						duration: 'slow', complete: function { lastposition = 0 refresh; }					});				});			}		}		var refresh = function { if ($(document).scrollTop > 0) {				if (!b_top.is(":visible")) b_top.fadeIn("slow"); }			else if (b_top.is(":visible")) b_top.fadeOut("slow"); if ($(window).scrollTop + $(window).height == $(document).height || lastposition > 0) { if (b_bottom.is(":visible")) b_bottom.fadeOut("slow"); }			else if (!b_bottom.is(":visible")) b_bottom.fadeIn("slow"); if (lastposition>0) {				if (!b_prev.is(":visible")) b_prev.fadeIn("slow"); }			else if (b_prev.is(":visible")) b_prev.fadeOut("slow"); }		$(window).scroll(function {			if ($('html, body').is(":animated"))				return;			refresh;		}); init; refresh; return this; }; }( jQuery )); $(function { $('.WikiaRail').append(' '); $('#totopscroller').totopscroller({}); });