Using JS to achieve the control content of the upward scrolling effect _ form effects

<script language=javascript1.2>
iens6=document.all| | document.getElementById
Ns4=document.layers

Specify speed of scroll (greater=faster)
var speed=10

if (IENS6) {
document.write (' <div id= "container" style= "position:relative;width:600;height:430;border:0px solid Black;o Verflow:hidden ">")
document.write (' <div id= ' content "style=" position:absolute;width:590;left:0;top:0 ">")
}
</SCRIPT>
<script language=javascript1.2>
if (IENS6)
document.write (' </div></div> ')
</SCRIPT>
<script language=javascript1.2>
if (IENS6) {
var Crossobj=document.getelementbyid? document.getElementById ("Content"): document.all.content
var contentheight=crossobj.offsetheight
}
else if (NS4) {
var crossobj=document.nscontainer.document.nscontent
var contentheight=crossobj.clip.height
}

function MoveDown () {
if (Iens6&&parseint (crossobj.style.top) >= (contentheight* (-1) +100))
Crossobj.style.top=parseint (crossobj.style.top)-speed
else if (ns4&&crossobj.top>= (contentheight* (-1) +100))
Crossobj.top-=speed
Movedownvar=settimeout ("MoveDown ()", 100)
}

function MoveUp () {
if (Iens6&&parseint (crossobj.style.top) <=0)
Crossobj.style.top=parseint (crossobj.style.top) +speed
else if (ns4&&crossobj.top<=0)
Crossobj.top+=speed
Moveupvar=settimeout ("MoveUp ()", 100)

}

function Getcontent_height () {
if (IENS6)
Contentheight=crossobj.offsetheight
else if (NS4)
Document.nscontainer.document.nscontent.visibility= "Show"
}
Window.onload=getcontent_height
</SCRIPT>