jquery: toTop watcher

gistfile1.txt

<script type="text/javascript">
<!--//--><![CDATA[//><!--
jQuery(document).ready(function($) { 
	$(window).scroll(function() {
		if($(this).scrollTop() != 0) {
			$("#toTop").fadeIn();	
		} else {
			$("#toTop").fadeOut();
		}
	});
	
	$("#toTop").click(function() {
		$("body,html").animate({scrollTop:0},800);
	});	
	
	});
//--><!]]>
</script>

CSS: 
#toTop {
    background: url("images/backtotop-arrow.png") no-repeat scroll 0% 0% transparent;
    width: 51px;
    height: 50px;
    position: fixed;
    cursor: pointer;
    bottom: 60px;
    right: 10px;
    display: none;
    z-index: 100;
    opacity: 1;
}