Inserir no head

<style>
<!--

/*Post-it note script- by javascriptkit.com
Visit JavaScript Kit (http://javascriptkit.com) for script
Credit must stay intact for use*/

#postit{
position:absolute;
width:250;
padding:5px;
background-color:lightyellow;
border:1px solid black;
visibility:hidden;
z-index:100;
cursor:hand;
}

-->
</style>


============================

inserir no body


<div id="postit" style="left:150px;top:150px">
<div align="right"><b><a href="javascript:closeit()">[Close It]</a></b></div>

<!--INSERT YOUR CONTENT HERE-->

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free Java applets?<br>
</a>Be sure to check out our sister site Freewarejava.com</font></p>
<p><font size="2" face="Arial"><a href="http://www.dynamicdrive.com" target="_new">Looking for
more scripts?<br>
</a>Visit our partner Dynamic Drive for free, original DHTML scripts and
components.</font></p>

<!--END YOUR CONTENT HERE-->

</div>

<script>

//Post-it only once per browser session? (0=no, 1=yes)
//Specifying 0 will cause postit to display every time page is loaded
var once_per_browser=0

///No need to edit beyond here///

var ns4=document.layers
var ie4=document.all
var ns6=document.getElementById&&!document.all

if (ns4)
crossobj=document.layers.postit
else if (ie4||ns6)
crossobj=ns6? document.getElementById("postit") : document.all.postit


function closeit(){
if (ie4||ns6)
crossobj.style.visibility="hidden"
else if (ns4)
crossobj.visibility="hide"
}

function get_cookie4(Name) {
  var search = Name + "="
  var returnvalue = "";
  if (document.cookie4.length > 0) {
    offset = document.cookie4.indexOf(search)
    if (offset != -1) { // if cookie4 exists
      offset += search.length
      // set index of beginning of value
      end = document.cookie4.indexOf(";", offset);
      // set index of end of cookie4 value
      if (end == -1)
         end = document.cookie4.length;
      returnvalue=unescape(document.cookie4.substring(offset, end))
      }
   }
  return returnvalue;
}

function showornot(){
if (get_cookie4('postdisplay')==''){
showit()
document.cookie4="postdisplay=yes"
}
}

function showit(){
if (ie4||ns6)
crossobj.style.visibility="visible"
else if (ns4)
crossobj.visibility="show"
}

if (once_per_browser)
showornot()
else
showit()

</script>

<script language="JavaScript1.2">

//drag drop function for ie4+ and NS6////
/////////////////////////////////

function drag_drop(e){
if (ie4&&dragapproved){
crossobj.style.left=tempx+event.clientX-offsetx
crossobj.style.top=tempy+event.clientY-offsety
return false
}
else if (ns6&&dragapproved){
crossobj.style.left=tempx+e.clientX-offsetx
crossobj.style.top=tempy+e.clientY-offsety
return false
}
}

function initializedrag(e){
if (ie4&&event.srcElement.id=="postit"||ns6&&e.target.id=="postit"){
offsetx=ie4? event.clientX : e.clientX
offsety=ie4? event.clientY : e.clientY

tempx=parseInt(crossobj.style.left)
tempy=parseInt(crossobj.style.top)

dragapproved=true
document.onmousemove=drag_drop
}
}
document.onmousedown=initializedrag
document.onmouseup=new Function("dragapproved=false")

</script>