var bw;
function getBrowserType() { 
    this.ver=navigator.appVersion 
    this.dom=document.getElementById?1:0 
    this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom)?1:0; 
    this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0; 
    this.ie4=(document.all && !this.dom)?1:0; 
    this.ns6=(this.dom && parseInt(this.ver) >= 5) ?1:0; 
    this.ns4=(document.layers && !this.dom)?1:0; 
    this.bw=(this.ie6 || this.ie5 || this.ie4 || this.ns4 || this.ns6) 
    this.name=this.ns4?'ns4':this.ns6?'ns6':this.ie4?'ie4':this.ie5?'ie5':this.ie6?'ie6':'x';
    return this 
} 
bw=top.br;
if (!bw) bw=new getBrowserType();
var speed=50 
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") 
    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){ 
	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 PerformInitialScroll(speed){ 
	if(initialised){ 
		loop=false; 
		if(speed>0) objScroller.down(speed) 
		else objScroller.up(speed) 
		if ((objScroller.y<0 && objScroller.y>speed) || (objScroller.y>0 && objScroller.y<speed)) {
			objScroller.MoveArea(0,0); //objContainer.clipHeight);
		} else {
			if (objScroller.y!=0) setTimeout('PerformInitialScroll('+speed+')',1) 
		}
	} 
} 
 
function CeaseScroll(){ 
    loop=false 
    if(timer) clearTimeout(timer) 
} 
var initialised; 
function InitialiseScrollableArea(c1,c2,b1,b2){ 
    objContainer=new ConstructObject(c1);
    objScroller=new ConstructObject(c2,c1);
    objScroller.MoveArea(0,-objScroller.scrollHeight); //objContainer.clipHeight);
    objContainer.css.visibility='visible';
    objUp=new ConstructObject(b1);
    objDown=new ConstructObject(b2);
    //alert('Container height: '+objContainer.clipHeight+'\nScroll height: '+objScroller.scrollHeight);
    if (objScroller.scrollHeight>objContainer.clipHeight) {
			objUp.css.visibility='visible';
			objDown.css.visibility='visible';
    } else {
			objUp.css.visibility='hidden';
			objDown.css.visibility='hidden';
    }
    initialised=true; 
    PerformInitialScroll(-24);
}