function BrowserCheck(){
    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 BrowserCheck();
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.scrollH = bw.ns4?this.css.document.height:this.el.offsetHeight;
    this.clipH = bw.ns4?this.css.clip.height:this.el.offsetHeight;
    this.up = SetPositionUp;this.down=SetPositionDown;
    this.SetPosition = SetPosition; this.x; this.y;
    this.obj = obj + "Object";
    eval(this.obj + "=this");
    return this
}
function SetPosition(x,y){
    this.x=x;this.y=y;
    this.css.left=this.x;
    this.css.top=this.y
}
function SetPositionDown(move){
	if(this.y>-this.scrollH+objBox.clipH){
    	this.SetPosition(0,this.y-move)
    	if(loop) setTimeout(this.obj+".down("+move+")",speed)
	}
}
function SetPositionUp(move){
	if(this.y<0){
    this.SetPosition(0,this.y-move)
    if(loop) setTimeout(this.obj+".up("+move+")",speed)
	}
}
function Scrolling(speed){
	if(initialised){
		loop=true;
		if(speed>0) objScroller.down(speed)
		else objScroller.up(speed)
	}
}
function StopScroll(){
    loop=false
    if(timer) clearTimeout(timer)
}
var initialised;
function Init(){
    objBox = new ConstructObject('Box')
    objScroller = new ConstructObject('Content','Box')
    objScroller.SetPosition(0,0)
    objBox.css.visibility = 'visible'
    initialised = true;
}