Tìm code sau : </body>


Chèn trước nó đoạn code sau : 


<style type='text/css'>
.gb_fixed{position:fixed;top:30px;right:0px;z-index:+10;}
* html .gb_fixed {position:relative;}
#hidden_gb2 {
display:none;
border:4px solid #bf3989;
-webkit-border-radius:5px;
-moz-border-radius:5px;
border-radius:5px;
background:#fff;
padding:0 3px 3px 3px;
}
</style>
<div class='gb_fixed'>
<table cellpadding='0' cellspacing='0' id='hidden_gb2'>
<tr><td><div><a href='javascript:void(0)' onclick='gb_showHideGB()'><b><center>[ Đóng Chat Box ]</center></b></a></div>

<!-- Begin ShoutMix - http://www.shoutmix.com --><iframe frameborder='0' height='460' scrolling='auto' src='http://www5.shoutmix.com/?mikaco' title='mikaco' width='100%'><a href='http://www5.shoutmix.com/?mikaco'>View shoutbox</a></iframe><br/><a href='http://www.shoutmix.com' title='Get your own free shoutbox chat widget at ShoutMix!'>ShoutMix chat widget</a><br/><!-- End ShoutMix -->

</td></tr></table></div>
<script type='text/javascript'>
//<![CDATA[
var gb_obj = document.getElementById("hidden_gb2");
var gb_finish = false;

function gb_setInitBehaviour(){
gb_obj.isHidden = true;
gb_setOpacity(gb_obj, "0.01");
}
function gb_setOpacity(obj, opacity){
opacity = opacity.substr(0, 4);
obj.style.opacity = opacity;
obj.style.filter = "alpha(opacity="+(Math.floor(parseFloat(opacity)*100)).toString()+")";
//writex(opacity);
}
function gb_showGB(){
gb_obj.style.display = "block";
gb_changeOpacityTo(1, "");
gb_obj.isHidden = false;
}
function gb_hideGB(){
gb_changeOpacityTo(0.01, "gb_obj.style.display = \"none\"");
gb_obj.isHidden = true;
}
function gb_changeOpacityTo(fin, funcStr){
var init = parseFloat(gb_obj.style.opacity.substr(0, 4));
var d = init <= 0.2 ? 0.04 : init <= 0.6 ? 0.08 : 0.20;
var m = fin>init ? 1 : -1;
var opacity = init + d * m;
if((fin-opacity)*(fin-init)<0){opacity = fin;}
gb_setOpacity(gb_obj, opacity.toString());
if(opacity != fin){setTimeout("gb_changeOpacityTo("+fin.toString()+", '"+funcStr+"')", 50);}
else{eval(funcStr);}
}
function gb_showHideGB(){
if(gb_obj.isHidden){gb_showGB();}
else{gb_hideGB();}
}
function writex(str){
document.getElementById("wx").innerHTML += str + " ";
}
gb_setInitBehaviour();
//]]>
</script>

<div class='gb_fixed' style='z-index:+5'>
<a href='javascript:void(0)' onclick='gb_showHideGB()'>
<img border='0' src='https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiSZsyGt1wjEOqAPTfmLcekToGDD9PgNN_E65ZgY60IQw_W1dprAYDqX8mhwTv3lQYOFxWKScAvqQmEQjuSo-MsqkC9w4rPT3Y6ZW3LGaHcDoBBbC4UxjTvii7UmGg9nOTSV63gpdNdZ6o/s1600/cbutton.png'/>
</a></div>