JavaScript implements a closed warning bar on top of IE

The function is very practical and the code is very simple. I don’t have much nonsense. I just offer it:

&lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http:///TR/xhtml1/DTD/"&gt;
&lt;html xmlns="http:///1999/xhtml"&gt;
&lt;head&gt;
&lt;meta http-equiv="Content-Type" content="text/html; charset=gb2312" /&gt;
&lt;title&gt;ImitationIEWarning bar at the top，Can be closed&lt;/title&gt;
&lt;style type="text/css"&gt;
#informationbar{
position: fixed;
left: 0;
width: 100%;
text-indent: 5px;
padding: 5px 0;
background-color: lightyellow;
border-bottom: 1px solid black;
font: bold 12px Verdana;
}
* html #informationbar{ /*IE6 hack*/
position: absolute;
width: expression(=="CSS1Compat"? +"px" : +"px");
}
&lt;/style&gt;
&lt;script type="text/javascript"&gt;
function informationbar(){
="always"
='&lt;a href="javascript:()"&gt;&lt;img src="" style="width: 14px; height: 14px; float: right; border: 0; margin-right: 5px"

/&gt;&lt;/a&gt;'
}
=function(data){
=+data
('&lt;div  style="top: -500px"&gt;'++'&lt;/div&gt;')
}
=function(){
var barinstance=this
if (parseInt()&lt;0){
=parseInt()+5+"px"
setTimeout(function(){()}, 50)
}
else{
if ( &amp;&amp; !)
("top", '=="CSS1Compat"? +"px" : +"px"')
else
=0
}
}
=function(){
("informationbar").="none"
if (=="session")
="infobarshown=1;path=/"
}
=function(type){
=type
}
=function(){
if (=="session" &amp;&amp; ("infobarshown")==-1 || =="always"){
=("informationbar")
=parseInt()
=*(-1)+"px"
()
}
}
=function(){
=null
}
&lt;/script&gt;
&lt;script type="text/javascript"&gt;
&lt;!--Invocation code--&gt;
var infobar=new informationbar()
('Guess：Tomorrow at noon12Money rain falls from the sky，Please prepare sacks！ 　&lt;a href="#">Buy sack</a><a href="#">Buy sack</a>')()
&lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
&lt;/body&gt;
&lt;/html&gt;

The above is the entire content of this article, I hope you like it.