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=120;
var loop, timer;
function ConstructObject(obj,nest){ 
    nest=(!nest) ? '':'document.'+nest+'.';
	this.name=obj;
    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,objIn){ 
	var objC = (objIn=='divContent_b')?objContainer_b:objContainer_a;
	if(this.y>-this.scrollHeight+objC.clipHeight){ 
	    this.MoveArea(0,this.y-move) 
    	if(loop) { 
			setTimeout(this.obj+".down("+move+",'"+objIn+"')",speed) 
		}
	} 
	window.status = 'Scroll down';
} 
function MoveAreaUp(move,objIn){ 
	if(this.y<0){ 
	    this.MoveArea(0,this.y-move); 
    	if(loop) setTimeout(this.obj+".up("+move+",'"+objIn+"')",speed);
	} 
	window.status = 'Scroll up';	
} 
function PerformScroll(speed,objIn){ 
	if(initialised){ 
		loop=true; 
		if(speed>0) objIn.down(speed,objIn.name);
		else objIn.up(speed,objIn); 
	} 
} 
function CeaseScroll(){ 
    loop=false;
    if(timer) clearTimeout(timer); 
}
var initialised; 
function InitialiseScrollableArea(){ 
    objContainer_a=new ConstructObject('divContainer_a'); 
    objScroller_a=new ConstructObject('divContent_a','divContainer_a');
    objScroller_a.MoveArea(0,0); 
    objContainer_a.css.visibility='visible';

    objContainer_b=new ConstructObject('divContainer_b'); 
    objScroller_b=new ConstructObject('divContent_b','divContainer_b');
    objScroller_b.MoveArea(0,0); 
    objContainer_b.css.visibility='visible';
    initialised=true; 

}
// end absolutely positioned scrollable area object scripts