Johann_Okt

But there is still one thing that´s a problem...You have to type one line more in your head.

So that the complete Script part have to sound like this:

    <script src="http://code.jquery.com/jquery-1.10.2.min.js"></script>
   <script src="//ajax.googleapis.com/ajax/libs/jquery/2.0.2/jquery.min.js"></script>
   <script>
       $(document).ready(function () {
       $(window).scroll(function () {
       if ($(this).scrollTop() > 100){$('.scrollup').fadeIn();}
       else {$('.scrollup').fadeOut();}});
       $('.scrollup').click(function () {
       $("html, body").animate({scrollTop: 0
       }, 600);
       return false;});});
   </script>

and than it should work ;D