// graphischer Scrollcode nach dhtml_Center
// ermittelt die Browserversion

var loop;			   // boolean Variable, ob weiter gescrollt werden soll	
var timer;		     

var speed = 30;		           // Scrollgeschwindigkeit  


function lib_bwcheck()				
{   this.ver=navigator.appVersion
	this.agent=navigator.userAgent
	this.dom=document.getElementById?1:0
	this.opera5=(navigator.userAgent.indexOf("Opera")>-1 && document.getElementById)?1:0
	this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom && !this.opera5)?1:0;
	this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom && !this.opera5)?1:0;
	this.ie4=(document.all && !this.dom && !this.opera5)?1:0;
	this.ie=this.ie4||this.ie5||this.ie6
	this.mac=this.agent.indexOf("Mac")>-1
	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.opera5)
	return this
}
var bw=lib_bwcheck()


//----------------------------------------------------------------------------------
//Zugriff auf Layer je nach Browser wird konstruiert

function makeObj(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
	//alert (this.scrollHeight)
	this.clipHeight=bw.ns4?this.css.clip.height:this.el.offsetHeight
	this.up=goUp;this.down=goDown;
	this.moveIt=moveIt; this.x=0; this.y=0;
    this.obj = obj + "Object"
    eval(this.obj + "=this")
    return this
}

var px = bw.ns4||window.opera?"":"px";


//----------------------------------------------------------------------------------------
//  dhtml Funktion zum Verschieben eines Layers

function moveIt(x,y){				
	this.x = x
	this.y = y
	this.css.left = this.x+px
	this.css.top = this.y+px
}

//----------------------------------------------------------------------------------------
//Funktion zum Scrollen nach unten

 


function goDown(move){				// Scrollfunktion zum Scrollen nach unten
 if (this.y>-this.scrollHeight+oCont.clipHeight){
		this.moveIt(0,this.y-move)
			if (loop)
			{
			setTimeout(this.obj+".down("+move+")",speed)
			}
	}
}

//---------------------------------------------------------------------------------------
function goUp(move){
  if (this.y<0){
		this.moveIt(0,this.y-move)
		if (loop)
		{
		setTimeout(this.obj+".up("+move+")",speed)
		}

	}
}

//---------------------------------------------------------------------------------------
// bestimmt ob nach unten oder oben gescrollt werden soll  und startet die Scrollschleife 

function scroll(speed){
	if (scrolltextLoaded)
	{

		loop = true;
		if (speed > 0)
		{
		oScroll.down(speed)
		}
		else
		{
		oScroll.up(speed)
		}
	}
}

//---------------------------------------------------------------------------------------
// beendet die Scroll-Schleife 

function noScroll(){

 	loop = false
	if (timer) clearTimeout(timer)
	
}

//---------------------------------------------------------------------------------------
// Startfunktion zum Scrollen 

/*

var scrolltextLoaded = false

function scrolltextInit(){
        oCont = new makeObj('divScrollTextCont')
	oScroll = new makeObj('divText','divScrollTextCont')
	oScroll.moveIt(0,0)
	oCont.css.visibility = "visible"
	scrolltextLoaded = true
}



*/
//if (bw.bw) onload = scrolltextInit  steht jetzt im body-Tag


//---------------------------------------------------------------------------------------
//  Ende Code dhtml- Center


	var scrolltextLoaded = false
	function scrolltextInit(obj,nest,ButUp,ButDown){

	oCont = new makeObj(nest)	      // Check Height of ScrollLayer
	oScroll = new makeObj(obj,nest)   // Check Height of Content


	oScroll.moveIt(0,0)
	oCont.css.visibility = "visible"
	
	// If Content > Scrollayer show ScrollButtons else hide them
	// Delete it, if you want see the Buttons every time
	if(oCont.el.offsetHeight > oScroll.el.offsetHeight){

	  this.imgUp=bw.dom?document.getElementById(ButUp):bw.ie4?document.all[ButUp]:bw.ns4?eval('document.'+ButUp):0;
	  this.imgDown=bw.dom?document.getElementById(ButDown):bw.ie4?document.all[ButDown]:bw.ns4?eval('document.'+ButDown):0;
	  
	  //this.imgUpUp=bw.dom?document.getElementById(ButUpUp):bw.ie4?document.all[ButUpUp]:bw.ns4?eval('document.'+ButUpUp):0;
	  //this.imgDownDown=bw.dom?document.getElementById(ButDownDown):bw.ie4?document.all[ButDownDown]:bw.ns4?eval('document.'+ButDownDown):0;

	  this.imgUp.style.visibility = "hidden" ; 
	  this.imgDown.style.visibility = "hidden" ; 
	  
	  //this.imgUpUp.style.visibility = "hidden" ; 
	  //this.imgDownDown.style.visibility = "hidden" ; 

	}
	scrolltextLoaded = true
}