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() 
 
 
var speed=50 
  
function ConstructObject(obj,nest, objcont){ 
    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";
    this.objcont = objcont;
    this.loop = false;
    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+this.objcont.clipHeight){ 
    this.MoveArea(0,this.y-move);
    if(this.loop) setTimeout(this.obj+".down("+move+")",speed);
	} 
} 
function MoveAreaUp(move){ 
	if(this.y<0){ 
    this.MoveArea(0,this.y-move);
    if(this.loop) setTimeout(this.obj+".up("+move+")",speed);
	} 
} 

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

function CeaseScroll(){ 
    objScroller.loop=false;
}

var initialised; 
function InitialiseScrollableArea(extContainer, intContainer){ 
    objScroller=new ConstructObject(intContainer,extContainer, (new ConstructObject(extContainer))); 
    objScroller.MoveArea(0,0); 
    objScroller.objcont.css.visibility='visible'; 
    initialised=true; 
}