If you want to install the button is fairly easy once you just need to follow these steps:
1. first select the Template > > then click Edit HTML.
2. use the method code </body> and look for CTRL + F for easier searching.
3. copy and paste the code below and then put the above code </body>.
<script src='http://id-pemula-javascript.googlecode.com/files/backtotop.js' type='text/javascript'/>
<a href='#' style='display:scroll;position:fixed;bottom:5px;right:5px;' title='Back to Top'><img onclick='MGJS.goTop();return false;' src='https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiAkMQQTXT5ucpGS35UoNstj3vFiKJmp3rOUm-tI3NhsrJqWB4D0RNfSrhRctFfwXTlXcgmYu04VLb-0K8bT3BAKwBX8BSTnK8sllXXz8F5FiA5dM1wqIzqJqM-qu7LDuf7vKndRo7WZC0/s1600/back-to-top.gif'/></a>
<script src='http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js' type='text/javascript'/>
<a href='#' style='display:scroll;position:fixed;bottom:5px;right:5px;' title='Back to Top'><img onclick='MGJS.goTop();return false;' src='https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiAkMQQTXT5ucpGS35UoNstj3vFiKJmp3rOUm-tI3NhsrJqWB4D0RNfSrhRctFfwXTlXcgmYu04VLb-0K8bT3BAKwBX8BSTnK8sllXXz8F5FiA5dM1wqIzqJqM-qu7LDuf7vKndRo7WZC0/s1600/back-to-top.gif'/></a>
<script src='http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js' type='text/javascript'/>
4. the last step you just click Save and view the results.
and now you have your keys back to top, not a long posting problems again, I congratulate the creative blogger friend, if you're still confused or just want to ask please feel free to provide comments and suggestions on this blog, thank you