2- Vào thiết kế -> Chọn Phần tử trang -> Chọn Thêm Tiện ích ->Chọn HTML/javrscrip
3- Thêm đoạn code sau vào.
<script src="http://dl.dropbox.com/u/66256041/Menu/namkna-blogspot/prototype.js" type="text/javascript"></script>
<script src="http://dl.dropbox.com/u/66256041/Menu/namkna-blogspot/effects.js" type="text/javascript"></script>
<script src="http://dl.dropbox.com/u/66256041/Menu/namkna-blogspot/side-bar.js" type="text/javascript"></script>
<style>
body{
font-size:75%;
}
a{
outline: none;
}
a:active{
outline: none;
}
#sideBar{
text-align:left;
}
#sideBar h2{
color:#F0FFFF;
font-size:110%;
font-family:arial;
margin:10px 10px 10px 10px;
font-weight:bold !important;
}
#sideBar h2 span{
font-size:125%;
font-weight:normal !important;
}
#sideBar ul{
margin:0px 0px 0px 0px;
padding:0px 0px 0px 0px;
}
#sideBar li{
margin:0px 5px 5px 10px;
padding: 0 0 0 10px;
list-style-type:none;
display:block;
background-color:#DA1074;
width:177px;
color:#FFFFFF;
}
#sideBar li a{
width:100%;
}
#sideBar li a:link,
#sideBar li a:visited{
color:#FFFFFF;
font-family:verdana;
font-size:100%;
text-decoration:none;
display:block;
margin:0px 0px 0px 0px;
padding:0 0 0 20px;
width:100%;
}
#sideBar li a:hover{
color:#FFFF00;
text-decoration:underline;
}
#sideBar{
position: fixed;
width: auto;
height: auto;
top: 140px;
left:0px;
background-image:url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgCxCIe4dPErPFGfjAv4grVxMBKGvKW6m46tM65y4OIt4QplbqR5leKCK03xUqwSzu8LbSLujyEDsc1hDk9JD22m6EFQKadL-O8hlh5Xjf11KsKYnHV6zFrzxY55j7g8boQEXeLyobPzTiW/s1600/left.collapse.border-namkna-blogspot-com.png);
background-position:top right;
background-repeat:repeat-y;
}
#sideBarTab{
float:left;
height:137px;
width:28px;
}
#sideBarTab img{
border:0px solid #FFFFFF;
}
#sideBarContents{
float:left;
overflow:hidden !important;
width:200px;
height:320px;
}
#sideBarContentsInner{
width:200px;
}</style>
<div id="sideBar">
<div id="sideBarContents" style="display:none;">
<div id="sideBarContentsInner">
<h2>Left<span>Menu</span></h2>
<ul>
<li><a href="#">Link 1</a></li>
<li><a href="#">Link 2</a></li>
<li><a href="#">Link 3</a></li>
<li><a href="#">Link 4</a></li>
</ul>
</div> </div>
<a id="sideBarTab" href="#"><img alt="sideBar" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg_I5jYsGQQIBzeg22Z5OYPLFZT6OoxVC1j-4w1n5Ii-X-O8B2Y6qkSt8KWx8BxufnCnNufNB-AljbHetPuywVNtiABNDs0FzH3Iut2DQVn7YuscdVV7YQpGq6rGP6UHwSDYIyCMWu5l8iE/s1600/sidebarcollapse-namkna-blogspot-com.png" title="sideBar" /></a>
</div>Bạn điều chỉnh thuộc tính CSS tùy ý.
Nguồn Namkhablog
