Dynamic Drop Down Fails in Blackboard 9.1

1) Script Title: Dynamic Drop Down Failure in Blackboard 9.1

2) Script URL (on DD): Amazon style Drop-in content box

Code:

---

<style type="text/css">
         
#dropinboxv2cover{
width: 320px; /*change width to desired */
-        height: 220px; /*change height to desired. REMOVE if you wish box to be content's natural height */
position:absolute; /*Don't change below 4 rules*/
z-index: 100;
overflow:hidden;
visibility: hidden;
}

#dropinboxv2{
width: 300px; /*change width to above width-20. */
height: 200px; /*change height to above height-20. REMOVE if you wish box to be content's natural height*/
border: 2px solid black; /*Customize box appearance*/
background-color: lightyellow;
padding: 4px;
position:absolute; /*Don't change below 3 rules */
left: 0;
top: 0;
}

</style>

<script type="text/javascript">

/***********************************************
* Amazon style Drop-in content box- © Dynamic Drive DHTML code library (www.dynamicdrive.com)
* Visit DynamicDrive.com for hundreds of DHTML scripts
* This notice must stay intact for legal use
* Go to http://www.dynamicdrive.com/ for full source code
***********************************************/

var dropboxleft=200 //set left position of box (in px)
var dropboxtop=100 //set top position of box (in px)
var dropspeed=15 //set speed of drop animation (larger=faster)

//Specify display mode. 3 possible values are:
//1) "always"- This makes the fade-in box load each time the page is displayed
//2) "oncepersession"- This uses cookies to display the fade-in box only once per browser session
//3) integer (ie: 5)- Finally, you can specify an integer to display the box randomly via a frequency of 1/integer...
// For example, 2 would display the box about (1/2) 50% of the time the page loads.

var displaymode="always"

///Don't edit beyond here///////////

if (parseInt(displaymode)!=NaN)
var random_num=Math.floor(Math.random()*displaymode)
var ie=document.all
var dom=document.getElementById

function initboxv2(){
if (!dom&&!ie)
return
crossboxcover=(dom)?document.getElementById("dropinboxv2cover") : document.all.dropinboxv2cover
crossbox=(dom)?document.getElementById("dropinboxv2"): document.all.dropinboxv2
scroll_top=(ie)? truebody().scrollTop : window.pageYOffset
crossbox.height=crossbox.offsetHeight
crossboxcover.style.height=parseInt(crossbox.height)+"px"
crossbox.style.top=crossbox.height*(-1)+"px"
crossboxcover.style.left=dropboxleft+"px"
crossboxcover.style.top=dropboxtop+"px"
crossboxcover.style.visibility=(dom||ie)? "visible" : "show"
dropstart=setInterval("dropinv2()",50)
}

function dropinv2(){
scroll_top=(ie)? truebody().scrollTop : window.pageYOffset
if (parseInt(crossbox.style.top)<0){
crossboxcover.style.top=scroll_top+dropboxtop+"px"
crossbox.style.top=parseInt(crossbox.style.top)+dropspeed+"px"
}
else{
clearInterval(dropstart)
crossbox.style.top=0
}
}

function dismissboxv2(){
if (window.dropstart) clearInterval(dropstart)
crossboxcover.style.visibility="hidden"
}

function truebody(){
return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}

function get_cookie(Name) {
var search = Name + "="
var returnvalue = ""
if (document.cookie.length > 0) {
offset = document.cookie.indexOf(search)
if (offset != -1) {
offset += search.length
end = document.cookie.indexOf(";", offset)
if (end == -1)
end = document.cookie.length;
returnvalue=unescape(document.cookie.substring(offset, end))
}
}
return returnvalue;
}

if (displaymode=="oncepersession" && get_cookie("droppedinv2")=="" || displaymode=="always" || parseInt(displaymode)!=NaN && random_num==0){
if (window.addEventListener)
window.addEventListener("load", initboxv2, false)
else if (window.attachEvent)
window.attachEvent("onload", initboxv2)
else if (document.getElementById || document.all)
window.onload=initboxv2
if (displaymode=="oncepersession")
document.cookie="droppedinv2=yes"
}

</script>

---

3) Describe problem: I have been using this Drop-in successfully in the footer of my Home Page in WebCT (Learning Management System (LMS) for Online Courses) for several years. We are now in the process of switching to Blackboard 9.1 LMS.(Blackboard has bought and now owns WebCT). What happens to this script in BB9.1 is that it shows up static in the footer but no longer as a dynamic drop down.
I have screen shots but don't know how to display them here.

I hope there is a fix for this. Please advise.
Daniel