ماشر للأعلى المطور sbtbacktotop

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</body>
فوقه

<style>
#sbtbacktotop{
background: url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiik1KehBipUQwYdhgEGVXai_TKRlq8wmCYpljwbnIziBvEHwUg4eu4D9beaCfDYDosgiGH6jlyxKyWh6UGoUJ6FwUPzP906YELLdY6AezH6LP6ETtTJkrFJWA_vo1zAByJrV9PKGlbWP3-/s1600/back-to-top-sprite-30224d9b.png) 0 0 no-repeat;
height: 130px;
width: 72px;
padding:5px;
position:fixed;
bottom: 5px;
right: 5px;
cursor:pointer;
transition:none;
z-index:15;
}
#sbtbacktotop:hover{
background:url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiik1KehBipUQwYdhgEGVXai_TKRlq8wmCYpljwbnIziBvEHwUg4eu4D9beaCfDYDosgiGH6jlyxKyWh6UGoUJ6FwUPzP906YELLdY6AezH6LP6ETtTJkrFJWA_vo1zAByJrV9PKGlbWP3-/s1600/back-to-top-sprite-30224d9b.png)no-repeat;
background-position: 0 -142px;
}
</style>
<script src='http://ajax.googleapis.com/ajax/libs/jquery/1.10.0/jquery.min.js'/>
<script type='text/javascript'>
//<![CDATA[
$(window).scroll(function(){if($(this).scrollTop()>100)
{$("#sbtbacktotop").removeAttr("href");$("#sbtbacktotop").stop().animate(
{bottom:"0"},{duration:100,queue:false})}
else{$("#sbtbacktotop").stop().animate({bottom:"30000"},
{duration:8000,queue:false})}});$(function()
{$("#sbtbacktotop").click(function()
{$("html, body").animate({scrollTop:0},"slow");
return false})});
//]]>
</script>
<a href='#' id='sbtbacktotop'></a>