]]></b:skin>

 /* to top */
    #toTop {
   <span style="color: #38761d;"> width:50px;</span>  /* Largura do botão * /
    border:1px solid #000; /* Cor e tipo da borda */
    text-align:center; /* Alinhamento do texto */
    padding:5px; /* Distancia entre texto e borda */
    position:fixed; /* Posição que faz com que ele corra por toda a página*/
    bottom:5px; 
    right:5px;
    cursor:pointer;
    color:#eee; /* Cor da fonte do botão */
    text-decoration:none;
    font-weight:700;  /* Define o negrito da fonte */
    -moz-border-radius:5px;  /* Definições para o ângulo do botão */
    -khtml-border-radius:5px;
    -webkit-border-radius:5px;
    border-radius:5px;
    }

</body>

 <a href='#' id='toTop'><img src='AQUI O ENDEREÇO DE SUA IMAGEM'> </img></a>

<script src='http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js' type='text/javascript'/> 
<script type='text/javascript'>     
/*-----------------------      
* jQuery Plugin: Scroll to Top      
* by Craig Wilson, Ph.Creative (http://www.ph-creative.com)      
*       
* Copyright (c) 2009 Ph.Creative Ltd.      
* Description: Adds an unobtrusive &quot;Scroll to Top&quot; link to your page with smooth scrolling.      
* For usage instructions and version updates to go http://blog.ph-creative.com/post/jquery-plugin-scroll-to-top.aspx      
*       
* Version: 1.0, 12/03/2009      
-----------------------*/ 
$(function(){$.fn.scrollToTop=function(){$(this).hide().removeAttr(&quot;href&quot;);if($(window).scrollTop()!=&quot;0&quot;){$(this).fadeIn(&quot;slow&quot;)}var   scrollDiv=$(this);$(window).scroll(function(){if($(window).scrollTop()==&quot;0&quot;){$(scrollDiv).fadeOut(&quot;slow&quot;)}else{$(scrollDiv).fadeIn(&quot;slow&quot;)}});$(this).click(function(){$(&quot;html,  body&quot;).animate({scrollTop:0},&quot;slow&quot;)})}}); 
  $(function() {     
                $(&quot;#toTop&quot;).scrollToTop();      
            });      
        </script>