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 isMac = navigator.appVersion.indexOf('Mac')>=0;

var speed=15;

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
}

var intTmp = 0;
var blnNs5Scroll;

function MoveAreaDown(move){
	blnNs5Scroll = (bw.ns5&&intTmp<this.el.offsetHeight);
	intTmp = this.el.offsetHeight;

	if(bw.ns5&&isMac||blnNs5Scroll||this.scrollHeight+this.y>=objContainer.clipHeight){
	    this.MoveArea(0,this.y-move*intSpeedComp)
		if(loop) setTimeout(this.obj+".up("+move+")",speed)
	}
}

function MoveAreaUp(move){
	if(this.y<0){
		this.MoveArea(0,this.y-move*intSpeedComp)
		if(loop) setTimeout(this.obj+".down("+move+")",speed)
	}
}

function PerformScroll(speed){
	if(initialised){
		loop=true;
		if(speed>0) objScroller.down(speed)
		else objScroller.up(speed)
	}
}
 
function CeaseScroll(){ 
    loop=false 
    if(timer) clearTimeout(timer) 
} 


function scrollButtonMO(strImg,intScroll){
	if(bw.ns4&&isMac){
//		swapImage(strImg,'_d');
		if(intScroll)PerformScroll(intScroll);
	}else{
//		swapImage(strImg,'_o');
	}
	return false;
}
function scrollButtonMD(strImg,intScroll){
	if(!(bw.ns4&&isMac)){
//		swapImage(strImg,'_d');
		if(intScroll)PerformScroll(intScroll);
	}
	return false;
}
function scrollButtonMU(strImg){
	if(!(bw.ns4&&isMac)){
//		swapImage(strImg,'_o');
		CeaseScroll();
	}
	return false;
}
function scrollButtonMT(strImg){
//	swapImage(strImg,'');
	CeaseScroll();
	return false;
}


var initialised;

function InitializeScrollableArea(){
    objContainer=new ConstructObject('divContainer');
    objScroller=new ConstructObject('divContent','divContainer');
    objScroller.MoveArea(0,0);
    objContainer.css.visibility='visible';
    initialised=true;
}


if(isNav4||isNav6){
	intBodyWidth = window.innerWidth;
	intBodyHeight = window.innerHeight;
}else{
	intBodyWidth = document.body.clientWidth;
	intBodyHeight = document.body.clientHeight;
}

//set scrollposition
var strScrollWidth = intBodyWidth;
var strScrollHeight = intBodyHeight;
var strScrollLeft = intBodyWidth/2-270;//363;
var strScrollTop = 92;//strScrollHeight/2-152;
var intSpeedComp = 1;


if(isMac){
	if(bw.ie5){
		intSpeedComp = 2;
	}
	if(bw.ns5){
		intSpeedComp = 10;
	}else{
		intSpeedComp = 1;
	}
}else{
	if(bw.ns4){
		intSpeedComp = 0.75;
	}else if(bw.ns5){
		intSpeedComp = 3;
	}
}