function verifyCompatibleBrowser(){ 
    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 verifyCompatibleBrowser() 

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.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(){
	if (scroll_direction) {
		if(this.y>-this.scrollHeight){ 
			this.MoveArea(0,this.y-move);
			if(loop) { timer = setTimeout(this.obj+".down("+move+")", speed);}
		} else { 
			this.MoveArea(0,objContainer.clipHeight);
			if(loop) { timer = setTimeout(this.obj+".down("+move+")", speed);}
		}
	} else {		
		if(this.y<objContainer.clipHeight){ 
			this.MoveArea(0,this.y+move);
			if(loop) { timer = setTimeout(this.obj+".down("+move+")", speed);}
		} else { 			
			this.MoveArea(0,-this.scrollHeight);
			if(loop) { timer = setTimeout(this.obj+".down("+move+")", speed);}			
		}		
	}
} 

function PerformScroll(){ 
	if(initialised){ 
		loop=true; 
		objScroller.down();
	} 
} 

function CeaseScroll(){ 	
	loop=false; 
	if(timer) {			
		timer = clearTimeout(timer) ;
	}	
}

function scrollfast(direction) {
	scroll_direction = direction;
	speed = 25;
	move = 3;
}

function scrollnormal(direction) {
	scroll_direction = direction;
	speed = 50;
	move = 1;
}

function scrollstate() {
	
	if (scroll_state) {
		CeaseScroll();
		scroll_state = false;
		document.images['btn_scrollstate'].src = 'images/scroll_play.gif';
	} else {
		PerformScroll();
		document.images['btn_scrollstate'].src = 'images/scroll_stop.gif';
		scroll_state = true;
		
	}
}

var speed=5;
var loop;
var initialised;
var timer;
var move;
var speed;
var scroll_direction = 1;
var scroll_state = true;

function InitialiseScrollableArea(){		
		move = 1;
		speed = 50;
    objContainer=new ConstructObject('divContainer') 
    objScroller=new ConstructObject('divContent','divContainer') 
    objScroller.MoveArea(0,0) 
    objContainer.css.visibility='visible' 
    initialised=true;     
		PerformScroll();
}