Scroll-to-top Button

js

$(document).ready(function(){
    //Check to see if the window is top if not then display button
    $(window).scroll(function(){
        if ($(this).scrollTop() > 100) {
            $('.scrollToTop').fadeIn();
        } else {
            $('.scrollToTop').fadeOut();
        }
    });
    //Click event to scroll to top
    $('.scrollToTop').click(function(){
        $('html, body').animate({scrollTop : 0},800);
        return false;
    });
});

markup

<a href="#" class="scrollToTop">Scroll To Top</a>

styles

.scrollToTop{
    width:100px;
    height:130px;
    padding:10px;
    text-align:center;
    background: whiteSmoke;
    font-weight: bold;
    color: #444;
    text-decoration: none;
    position:fixed;
    top:75px;
    right:40px;
    display:none;
    background: url('arrow_up.png') no-repeat 0px 20px;
}
.scrollToTop:hover{
    text-decoration:none;
}