/********************************************************************************
Copyright (C) 1999 Thomas Brattli
This script is made by and copyrighted to Thomas Brattli at www.bratta.com
Visit for more great scripts. This may be used freely as long as this msg is intact!
I will also appriciate any links you could give me.
********************************************************************************/
//Default browsercheck, added to all scripts!
function checkBrowser(){
	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.nn = (this.ns4||this.ns5);
	this.ie = (this.ie5 || this.ie4);
	this.bw=(this.ie5 || this.ie4 || this.ns4 || this.ns5)
	return this
}
bw=new checkBrowser()
/*********************************************************************************
These are the variables you have to set:
*********************************************************************************/


//The speed of the timeout between each scroll.
timSpeed=50

//The height of the container (change this when it scrolls to much or to little)
var contHeight=200;

/*********************************************************************************
This is the object constructor function, which applies 
methods and properties to the Cross-browser layer object
*********************************************************************************/
function makeScrollObj(obj,nest){
	nest=(!nest) ? '':'document.'+nest+'.'
   	this.css=bw.dom? document.getElementById(obj).style:bw.ie4?document.all[obj].style:bw.ns4?eval(nest+"document.layers." +obj):0;
	this.el=bw.dom?document.getElementById(obj):bw.ie4?document.all[obj]:bw.ns4?eval(nest+'document.'+obj):0;	
	this.ref=bw.dom || bw.ie4? document:bw.ns4?eval(nest+"document.layers." +obj+".document"):0;		
	this.x=(bw.ns4 || bw.ns5)? this.css.left:this.css.pixelLeft;
	this.y=(bw.ns4 || bw.ns5)? this.css.top:this.css.pixelTop;		
	this.height=bw.ns4?this.ref.height:this.el.offsetHeight;		
	this.width=bw.ns4?this.ref.width:this.el.offsetWidth;		
	this.hideIt=b_hideIt; this.showIt=b_showIt; this.moveIt=b_moveIt	
	this.writeIt=b_writeIt;
	this.top=b_gettop
	this.left=b_getleft
	return this
}
//methods for makeScrollObj
function b_showIt(){this.css.visibility="visible"; this.status=1}
function b_hideIt(){this.css.visibility="hidden"; this.status=0}
function b_moveIt(x,y){this.x=x; this.y=y; this.css.left=this.x; this.css.top=this.y}	

function b_gettop(){
	var gtop=(bw.ns4 || bw.ns5) ? eval(this.css.top):eval(this.css.pixelTop);
	return gtop;
}

function b_getleft(){
	var gleft=(bw.ns4 || bw.ns5) ? eval(this.css.left):eval(this.css.pixelLeft);
	return gleft;
}

function b_writeIt(text){
	if(bw.ns4){this.ref.write(text);this.ref.close()}
	else if(bw.ie4 || bw.ie5) this.evnt.innerHTML=text
	else if(bw.ns5) null; //ADD NS5 HERE.
}

//Variables
var scrollTim;
var active=0;
/*********************************************************************************
The scroll function. Checks what way to scroll and checks if the
layer is not already on top or bottom.
*********************************************************************************/
function scroll(speed){
	clearTimeout(scrollTim)
	way=speed>0?1:0
	if((!way && oScroll[active].top()>-oScroll[active].height+contHeight) || (oScroll[active].top()<0 && way)){
		oScroll[active].css.top=oScroll[active].top()+speed
		scrollTim=setTimeout("scroll("+speed+")",timSpeed)
	}
}
//Clears the timeout so the scroll stops, this is called onmouseout.
function noScroll(){
	clearTimeout(scrollTim)
}
/*********************************************************************************
Changes the active layer. Hides the one that's visible and
shows the "new" one. Also set's the new layers top to
0 so it starts at top.
*********************************************************************************/
function changeActive(num){
	oScroll[active].css.visibility='hidden'
	active=num
	oScroll[active].css.top=0
	oScroll[active].css.visibility='visible'
}

/*********************************************************************************
Executes the scrollInit function on pageload.
*********************************************************************************/
//onload=scrollInit;

// sd: this function is triggered by the body because of image swapping which has to be triggered onload as well