Code
<!-- Top Begin -->
<script>
var Totop = jQuery;
Totop(function(){
Totop('html').append('<div id="totop"></div><div id="totop2"></div>')
Totop('#totop').hover(function(){
Totop('#totop2').fadeIn().mouseout(function(){
Totop(this).fadeOut(200)
})
})
var defaultTop=Totop(window).height()-10-140//10 vi tri canh bottom ban dau, 249 la chieu cao
Totop(window).resize(function(){
defaultTop=Totop(window).height()-10-140//phong tru truong hop resize trinh duyet
})
var ranPo=['-298px 0','-447px 0','-596px 0','-745px 0']
Totop(window).scroll(function(){
var $top=Totop(window).scrollTop()
if($top>50){
Totop('#totop').fadeIn(100)
Totop('#totop2').css('top',defaultTop)
}else{
Totop('#totop,#totop2').fadeOut(100)
}
})
Totop('#totop2').click(function(){
timeranPo=window.setInterval(function(){
Totop('#totop2').css({'background-position':ranPo[Math.floor(Math.random()*ranPo.length)],'display':'block'})
},200)
setTimeout(function(){
Totop('html,body').stop().animate({scrollTop:'50px'},400,function(){
Totop('#totop2').stop().animate({'top':'-250px'},300,function(){
clearInterval(timeranPo)
Totop('#totop2').css('background-position','-149px 0').hide()
})
})
},800)
})
})
</script>
<style>
#totop,#totop2
{
position: fixed;right: 0;bottom: 10px;
width: 149px;height: 140px;overflow: hidden;
cursor: pointer;display: none;
background: url(http://diendan.joomlaviet.vn/up.png) no-repeat 0px 0;
z-index: 9999;
}
#totop2{
background: url(http://diendan.joomlaviet.vn/up.png) no-repeat -149px 0;
}
</style>
<!-- Top End -->
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