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Cách thực hiện :
1. Vào Thiết kế > Phần tử trang
2. Tạo một widget HTML\JavaScripts và chèn vào code bên dưới :
  <style type="text/css">
            * html div#fl813691 {position: absolute; overflow:hidden;
            top:expression(eval(document.compatMode &&
            document.compatMode=='CSS1Compat') ?
            documentElement.scrollTop
            +(documentElement.clientHeight-this.clientHeight)
            : document.body.scrollTop
            +(document.body.clientHeight-this.clientHeight));}
            #fl813691{font: 12px Arial, Helvetica, sans-serif; color:#666; position:fixed; _position: absolute; right:0; bottom:0; height:150px; }
            #eb951855{ width:279px; padding-right:7px; background:url(http://img98.imageshack.us/img98/9400/rightp.gif) no-repeat right top;}
            #cob263512{background:url(http://img205.imageshack.us/img205/2176/fulld.gif) no-repeat left top; height:150px; padding-left:7px;}
            #coh963846{color:#690;display:block; height:20px; line-height:20px; font-size:11px; width:277px;}
            #coh963846 a{color:#690;text-decoration:none;}
            #coc67178{float:right; padding:0; margin:0; list-style:none; overflow:hidden; height:15px;}
                        #coc67178 li{display:inline;}
                        #coc67178 li a{background-image:url(http://img205.imageshack.us/img205/9837/closebutton.gif); background-repeat:no-repeat; width:30px; height:0; padding-top:15px; overflow:hidden; float:left;}
                            #coc67178 li a.close{background-position: 0 0;}
                            #coc67178 li a.close:hover{background-position: 0 -15px;}
                            #coc67178 li a.min{background-position: -30px 0;}
                            #coc67178 li a.min:hover{background-position: -30px -15px;}
                            #coc67178 li a.max{background-position: -60px 0;}
                            #coc67178 li a.max:hover{background-position: -60px -15px;}
            #co453569{display:block; margin:0; padding:0; height:123px;  border-style:solid; border-width:1px; border-color:#111 #999 #999 #111; line-height:1.6em; overflow:hidden;}
            </style>
             <div id="fl813691" style="height: 152px;">
                <div id="eb951855">
                <div id="cob263512">
                    <div id="coh963846">
                        <ul id="coc67178">
                            <li id="pf204652hide"><a class="min" href="javascript:pf204652clickhide();" title="&#7848;n &#273;i">&#7848;n</a></li>
                            <li id="pf204652show" style="display: none;"><a class="max" href="javascript:pf204652clickshow();" title="Hi&#7879;n l&#7841;i">Xem </a></li>
                        </ul>
                    &nbsp;Ghé thăm blog của Tôi.
                   </div>
                    <div id="co453569">
     <!-- code ads -->
<a target="_blank" href="http://mrhpvn.blogspot.com" rel="nofollow"> <img style="margin:3px 1px 1px 3px;" border="0" width="264" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjYimNumuTt_lslzCbfqHLQ9jAI2dL1E6osXzk2aa8zcoyUSq7iS8lFnR0moOASMeYJy2eTpkE8VMl7O92x8ihv-w7Z3gssiYSaxyE8FwRNel_bwpxdQrl1_xnwdaSPaYHQSqLb90474QgV/s1600/Famlogoblogger9.jpg" height="115" title="Blog thông tin tỏng hợp | Trần Phúc Minh Phòng Nông nghiệp & PTNT"/></a>
<!-- code ads --></div></div></div></div>
            <script>
            pf204652bottomLayer = document.getElementById('fl813691');
            var pf204652IntervalId = 0;
            var pf204652maxHeight = 150;//Chieu cao khung quang cao
            var pf204652minHeight = 20;
            var pf204652curHeight = 0;
            function pf204652show( ){
              pf204652curHeight += 2;
              if (pf204652curHeight > pf204652maxHeight){
                clearInterval ( pf204652IntervalId );
              }
              pf204652bottomLayer.style.height = pf204652curHeight+'px';
            }
            function pf204652hide( ){
              pf204652curHeight -= 3;
              if (pf204652curHeight < pf204652minHeight){
                clearInterval ( pf204652IntervalId );
              }
              pf204652bottomLayer.style.height = pf204652curHeight+'px';
            }
            pf204652IntervalId = setInterval ( 'pf204652show()', 5 );
            function pf204652clickhide(){
                document.getElementById('pf204652hide').style.display='none';
                document.getElementById('pf204652show').style.display='inline';
                pf204652IntervalId = setInterval ( 'pf204652hide()', 5 );
            }
            function pf204652clickshow(){
                document.getElementById('pf204652hide').style.display='inline';
                document.getElementById('pf204652show').style.display='none';
                pf204652IntervalId = setInterval ( 'pf204652show()', 5 );
            }
            function pf204652clickclose(){
                document.body.style.marginBottom = '0px';
                pf204652bottomLayer.style.display = 'none';
            }
            </script>Trong đoạn code trên :

• Xem phim Blog Trần Phúc Minh : tiêu đề khung quảng cáo
• http://www.youtube.com/p/19504296AFE44F36?hl=vi_VN&amp;fs=1 : liên kết đến website nhà quảng cáo
• https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiKyJKTyEfYPtfXQPJGno-58qV6mzP-4Mo4EruPYu33okPx3EzUcAweAKzJdiMZ-rry8jJXCLiF8trAzo42IoYyYvt2jBu2W16XrDvnjDcRYK_2XkEH94SmoD2WVG1TfiGVkYabhOJ5CXs/s1600/bannerfans_419401.jpg : hình ảnh quảng cáo

3. Save and Done.
Chúc các bạn thành công !