var refreshRate=20;
 
var scrolling, timer, initialised;

function GetObject(layer,nestedlayer){ 
    nestedlayer=(!nestedlayer) ? '':'document.'+nestedlayer+'.';
    this.el=browserinfos.dom?document.getElementById(layer):browserinfos.ie4?document.all[layer]:browserinfos.ns4?eval(nestedlayer+'document.'+layer):0;
    this.css=browserinfos.dom?document.getElementById(layer).style:browserinfos.ie4?document.all[layer].style:browserinfos.ns4?eval(nestedlayer+'document.'+layer):0;
    this.contentHeight=browserinfos.ns4?this.css.document.height:this.el.offsetHeight;
    this.clipHeight=browserinfos.ns4?this.css.clip.height:this.el.offsetHeight;
    this.up=ScrollUp;this.down=ScrollDown;
    this.SetLayerPosition=SetLayerPosition; this.x; this.y;
    eval(this.obj + "=this");
    return this;
} 
function SetLayerPosition(x,y){ 
    this.x=x;this.y=y;
    this.css.left=this.x;
    this.css.top=this.y;
} 
 
function ScrollDown(pixelAmount){ 
	if(this.y>-this.contentHeight+objContainer.clipHeight){ 
    this.SetLayerPosition(0,this.y-pixelAmount); //pixelAmount is positive so -+ = -, we want the layer move up
    if(scrolling) setTimeout(this.obj+".down("+pixelAmount+")",refreshRate);
	} 
}

function ScrollUp(pixelAmount){ 
	if(this.y<0){ //to see up, the layer must go down :o) so the y must be negative
    this.SetLayerPosition(0,this.y-pixelAmount); //pixelAmount is negative so -- = +, we want the layer move down
    if(scrolling) setTimeout(this.obj+".up("+pixelAmount+")",refreshRate);
	} 
} 
 
function MyScroll(pixelAmount){ 
	if(initialised){ 
		scrolling=true;
		if(pixelAmount>0) objScroller.down(pixelAmount);
		else objScroller.up(pixelAmount);
	} 
} 
 
function StopScroll(){ 
    scrolling=false;
    if(timer) clearTimeout(timer);
}