Back to top jQuery

css.css

#back-top {
	position: fixed;
	bottom: 30px;
	margin-left: -150px;
}

#back-top a {
	width: 108px;
	display: block;
	text-align: center;
	font: 11px/100% Arial, Helvetica, sans-serif;
	text-transform: uppercase;
	text-decoration: none;
	color: #bbb;

	/* transition */
	-webkit-transition: 1s;
	-moz-transition: 1s;
	transition: 1s;
}
#back-top a:hover {
	color: #000;
}

/* arrow icon (span tag) */
#back-top span {
	width: 108px;
	height: 108px;
	display: block;
	margin-bottom: 7px;
	background: #ddd url(up-arrow.png) no-repeat center center;

	/* rounded corners */
	-webkit-border-radius: 15px;
	-moz-border-radius: 15px;
	border-radius: 15px;

	/* transition */
	-webkit-transition: 1s;
	-moz-transition: 1s;
	transition: 1s;
}
#back-top a:hover span {
	background-color: #777;
}

html.html

<p id="back-top">
   <a href="javascript:;"><span></span>Back to Top</a>
</p>

js.js

<script>
$(document).ready(function(){

	// hide #back-top first
	$("#back-top").hide();
	
	// fade in #back-top
	$(function () {
		$(window).scroll(function () {
			if ($(this).scrollTop() > 100) {
				$('#back-top').fadeIn();
			} else {
				$('#back-top').fadeOut();
			}
		});

		// scroll body to 0px on click
		$('#back-top a').click(function () {
			$('body,html').animate({
				scrollTop: 0
			}, 800);
			return false;
		});
	});

});
</script>

txt.txt

http://webdesignerwall.com/tutorials/animated-scroll-to-top

typo3.ts

tt_content.stdWrap.innerWrap2 = |<p id="back-top"><a href="javascript:;"><span></span>Nach oben</a></p>