jQuery - Simple Back to Top Link

snippet.js

// Back to top link. Automatically fades in once user has started scrolling
function backtotop() {
	jQuery( window ).scroll(function() {
		if(jQuery( this ).scrollTop() > 0) {
			jQuery( '#toTop' ).fadeIn();	
		} else {
			jQuery( '#toTop' ).fadeOut();
		}
	});
 
	jQuery( '#toTop' ).click(function (e) {
		jQuery(' body,html' ).animate({ scrollTop:0 }, 800 );
		e.preventDefault();
	});
}