function ConstructObject(obj,nest){
    nest=(!nest) ? '':'document.'+nest+'.'

this.el=bw.dom?document.getElementById(obj):bw.ie4?document.all[obj]:bw.ns4?
eval(nest+'document.'+obj):0;

this.css=bw.dom?document.getElementById(obj).style:bw.ie4?document.all[obj].
style:bw.ns4?eval(nest+'document.'+obj):0;
    this.scrollHeight=bw.ns4?this.css.document.height:this.el.offsetHeight
    this.clipHeight=bw.ns4?this.css.clip.height:this.el.offsetHeight
    this.up=MoveAreaUp;this.down=MoveAreaDown;
    this.MoveArea=MoveArea; this.x; this.y;
    this.obj = obj + "Object"
    eval(this.obj + "=this")
    return this
}
function MoveArea(x,y){
    this.x=x;this.y=y
    this.css.left=this.x
    this.css.top=this.y
}

function MoveAreaDown(move){
 if(this.y>-this.scrollHeight+objContainer.clipHeight){
    this.MoveArea(0,this.y-move)
    if(loop) setTimeout(this.obj+".down("+move+")",speed)
 }
}
function MoveAreaUp(move){
 if(this.y<0){
    this.MoveArea(0,this.y-move)
    if(loop) setTimeout(this.obj+".up("+move+")",speed)
 }
}

function PerformScroll(speed){
 if(initialised){
  loop=true;
  if(speed>0) objScroller.down(speed)
  else objScroller.up(speed)
 }
}

function CeaseScroll(){
    loop=false
    if(timer) clearTimeout(timer)
}
function InitialiseScrollableArea(){
    objContainer=new ConstructObject('divContainer')
    objScroller=new ConstructObject('divContent','divContainer')
    objScroller.MoveArea(0,0)
    objContainer.css.visibility='visible'
    initialised=true;
}