function browsertest(){ 
    this.ver=navigator.appVersion 
    this.dom=document.getElementById?1:0 
    this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0; 
    this.ie4=(document.all && !this.dom)?1:0; 
    this.ns5=(this.dom && parseInt(this.ver) >= 5) ?1:0; 
    this.ns4=(document.layers && !this.dom)?1:0; 
    this.bw=(this.ie5 || this.ie4 || this.ns4 || this.ns5) 
    return this 
} 
bw=new browsertest() 
 
var snelheid		 		= 0;
var ScrollSnelheid	= 1; 

var loop, timer 
 
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") 
    
    this.MaxHeight = "340";

		
		//alert("scroll: " + this.scrollHeight + " Max: " + this.MaxHeight);

    if(this.scrollHeight > 0)
    {
    	if(this.scrollHeight < this.MaxHeight)
    	{
    		document.getElementById('text').style.minHeight = "340px";
    		document.getElementById('text').style.height 		= "340px";;
    	}
    	else
    	{
    		document.getElementById("scroll_up").style.display 		= "block";
				document.getElementById("scroll_down").style.display 	= "block";
    		document.getElementById('text').style.minHeight 			= "340px";;
    		document.getElementById('text').style.height 					= "340px";;
    	}
    }   
    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+340){ 
    this.MoveArea(0,this.y-move) 
    if(loop){ setTimeout(this.obj+".down("+move+")",snelheid);}
	} 
} 
function MoveAreaUp(move){ 

	
	if(this.y < 0){ 
    this.MoveArea(0,this.y-move) 
    if(loop) setTimeout(this.obj+".up("+move+")",snelheid) 
	} 
} 
 
function start_scrollen(snelheid){ 
	if(initialised){ 
		loop=true; 
		if(snelheid > 0){ objScroller.down(snelheid + ScrollSnelheid) }
		else{	objScroller.up(snelheid - ScrollSnelheid) }
	} 
} 
 
function stop_scrollen(){ 
    loop=false 
    if(timer) clearTimeout(timer) 
} 

var initialised; 
function start_scrollmenu(){ 
	if(document.getElementById('scrollContainer'))
	{
    objContainer=new ConstructObject('scrollContainer') 
    objScroller=new ConstructObject('scrollContent','scrollContainer') 
    objScroller.MoveArea(0,0) 
    //objContainer.css.visibility='hidden' 
    initialised=true; 
  }
}

onload=start_scrollmenu;