[Code] Nút trượt lên xuống

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Spoiler:
Code:
<!--controchuot-->
<script type='text/javascript'>var
maxheight =
$(document).height();$(function(){$.fn.scrollToMiddle=function(){$(this).hide().removeAttr("href");if($(window).scrollTop()!="maxheight/2"){$(this).fadeIn("slow")}var
scrollDiv=$(this);$(window).scroll(function(){if($(window).scrollTop()=="maxheight/2"){$(scrollDiv).fadeOut("slow")}else{$(scrollDiv).fadeIn("slow")}});$(this).click(function(){$("html,
body").animate({scrollTop:maxheight/2},"slow")})}});$(function(){$.fn.scrollToBottom=function(){$(this).hide().removeAttr("href");if($(window).scrollTop()!="maxheight"){$(this).fadeIn("slow")}var
scrollDiv=$(this);$(window).scroll(function(){if($(window).scrollTop()=="maxheight"){$(scrollDiv).fadeOut("slow")}else{$(scrollDiv).fadeIn("slow")}});$(this).click(function(){$("html,
body").animate({scrollTop:maxheight},"slow")})}});$(function(){$.fn.scrollToTop=function(){$(this).hide().removeAttr("href");if($(window).scrollTop()!="0"){$(this).fadeIn("slow")}var
scrollDiv=$(this);$(window).scroll(function(){if($(window).scrollTop()=="0"){$(scrollDiv).fadeOut("slow")}else{$(scrollDiv).fadeIn("slow")}});$(this).click(function(){$("html,
body").animate({scrollTop:0},"slow")})}});$(function()
{$("#toMiddle").scrollToMiddle();$("#toTop").scrollToTop();$("#toBottom").scrollToBottom();});</script><div
style="bottom: 25px;clip: inherit;position: fixed;right: 5px;"><a
onmouseover="show_tooltip(this,'<font color=#ff0000>Đầu
trang</font>','');"><a href="#" id="toTop"><img
alt="" border="0"
src="http://i34.servimg.com/u/f34/15/44/78/93/top10110.png"></a></a><br><a
onmouseover="show_tooltip(this,'<font color=#ff0000>Gữa
trang</font>','');"><a href="#" id="toMiddle"><img
alt="" border="0"
src="http://i34.servimg.com/u/f34/15/44/78/93/middle10.png"></a></a><br><a
onmouseover="show_tooltip(this,'<font color=#ff0000>Cuối
trang</font>','');"><a href="#" id="toBottom"><img
alt="" border="0"
src="http://i34.servimg.com/u/f34/15/44/78/93/bottom10.png"></a></a></div>
      </div>
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