[JS] - Back to Top button Scroll

[JS] - Back to Top button Scroll

// html
<a href="javascript:void(0);" id="scroll" title="Scroll to Top" style="display: none;">Top<span></span></a>

// css
#scroll {
    position:fixed;
	right:10px;
	z-index: 9999;
    bottom:10px;
    cursor:pointer;
    width:40px;
    height:40px;
    background-color:#807474;
    text-indent:-9999px;
    display:none;
    -webkit-border-radius:5px;
    -moz-border-radius:5px;
    border-radius:5px;
}
#scroll span {
    position:absolute;
    top:50%;
    left:50%;
    margin-left:-8px;
    margin-top:-12px;
    height:0;
    width:0;
    border:8px solid transparent;
    border-bottom-color:#ffffff
}
#scroll:hover {
    background-color:#000;
    opacity:1;
    filter:"alpha(opacity=100)";
    -ms-filter:"alpha(opacity=100)";
}

// js
function scrollTop() {
    $(window).scroll(function(){
      if($(this).scrollTop() > 100){
        $('#scroll').fadeIn();
      }else{
        $('#scroll').fadeOut();
      }
    });
    $('#scroll').click(function(){ 
      $("html, body").animate({ scrollTop: 0 }, 600); 
      return false; 
    });
  }
  scrollTop();