var speed=30

var loop, timer

function ConstructObject(obj,nest){
	nest=(!nest) ? '':'document.'+nest+'.'
	this.el=document.getElementById(obj);
	this.css=document.getElementById(obj).style;
	this.scrollHeight=this.el.offsetHeight
	this.clipHeight=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 + "px"
    this.css.top=this.y + "px"
}

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)
}
var initialised;
function InitialiseScrollableArea(){
    objContainer=new ConstructObject('divContainer')
    objScroller=new ConstructObject('divContent','divContainer')
    objScroller.MoveArea(0,0)
    objContainer.css.visibility='visible'
    initialised=true;

}

function Fensterk (Adresse) {
  MeinFenster = window.open(Adresse, "Früchtchen", "width=400,height=500,left=10,top=20");
  MeinFenster.focus();
}