// cmsticker class

function cmsticker(name,width,height,speed,pause,initText)

{

	this.name	= name;

	this.initialized 	= false;

	this.created 		= false;

	this.paused			= true;

	this.turbo			= false;

	if(!document.getElementById) return false;



	this.placer = null;

	this.initText = initText?initText:"loading...";

	this.id		= Math.round(Math.random()*100);

	this.speed  = speed?speed:50;

	this.waittime= pause?(pause*1000):2000;

	this.pos	= 0;

	this.newscounter = 0;

	this.news	= new Array();

	this.width	= width;

	this.height = height;

	this.timeHandler = null;

	this.running = false;

	// generate div-tags

	document.write("<div id=\"tickerplacer"+this.id+"\" STYLE=\"width:"+width+"; height:"+height+";\">"+this.initText+"</div>");

	document.write("<div id=\"tickerwindow"+this.id+"\" STYLE=\"position:absolute; left:0; top:0; width:"+width+"; height:"+height+";overflow:hidden;visibility:hidden\"></div>");

	

	

	this.placer	= document.getElementById("tickerplacer"+this.id);

	if(!this.placer)

	{

		alert("internal error: could not load placer object");

		return false;

	}

	this.tickerwindow	= document.getElementById("tickerwindow"+this.id);

	if(!this.tickerwindow)

	{

		alert("internal error: could not load ticker_window object");

		return false;

	}

	

	this.created = true;



	// mehthod

	this.start 	= cmsticker_start;

	this.init 	= cmsticker_init;

	this.addNews= cmsticker_addNews;

	this.tick	= cmsticker_tick;

	this.pause	= cmsticker_pause;

	this.stop	= cmsticker_stop;

	this.cont	= cmsticker_cont;

	this.setSpeed = cmsticker_setSpeed;

	this.slower	= cmsticker_slower;

	this.faster = cmsticker_faster;



	return true;

	

}



function cmsticker_faster(amount)

{

	if(!amount) amount = 20;

	this.speed -=amount;

	if(this.speed<1) this.speed=1;

}



function cmsticker_slower(amount)

{

	if(!amount) amount = 20;

	this.speed +=amount;

	if(this.speed>100) this.speed=100;

}





// methods cmsticker

function cmsticker_setSpeed(speed)

{

	this.speed = speed

}



function cmsticker_addNews(id,myobject)

{
	if(id)
		myNews = document.getElementById(id);
	else
		myNews = myobject;

	if(!myNews)

	{

		alert("Die Neuigkeit mit der id '"+id+"' konnte nicht gefunden werden");

		this.initialized=false;

		return false;

	}

	

	this.tickerwindow.appendChild(myNews);

	myNews.style.position="absolute";

	myNews.style.height = this.height;

	myNews.style.width = this.width;

	myNews.style.overflow="hidden";

	myNews.style.visibility="hidden";

	this.news[this.news.length] = myNews;

}



function cmsticker_init()

{

	if(!this.created) return;

	y = findPosY(this.placer);

	x = findPosX(this.placer);

	

	// set position of tickerwindow according to placer

	this.tickerwindow.style.posTop = y;

	this.tickerwindow.style.posLeft = x;

	this.tickerwindow.style.top = y;

	this.tickerwindow.style.left = x;

	// set visibility of placer and Tickerwindow

	this.tickerwindow.style.visibility = "visible";

	this.placer.style.visibility = "hidden";

	// check if only one news is added and add copy of it if so
	if(this.news.length==1)
	{
		clone = this.news[0].cloneNode(true);
		clone.id +="_clone";
//		this.news[0].insertBefore(clone,this.news[0]);
		this.addNews(null,clone);
	}

	this.initialized = true;



	return true;

}







function cmsticker_start()

{

	if(!this.initialized)

	{

		if(!this.init()) return false;

	}

	if(!this.news[this.newscounter]) return false;;

	// prepare current news

	this.paused = false;

	this.news[this.newscounter].style.posTop = this.height;	

	this.news[this.newscounter].style.top = this.height;	

	this.news[this.newscounter].style.visibility="visible";
	to = this.name+".tick()";

	this.timeHandler=setTimeout(to,this.speed);

	

}



function cmsticker_tick()

{

	this.running = true;

	this.pos+=1;

	if(this.pos>this.height) 

	{

		this.pause();

		return;

	}

	else

	{

		// set layer

		prev = this.newscounter-1;
		if(prev<0) prev=this.news.length-1;
		this.news[this.newscounter].style.posTop=this.height-this.pos ;
		this.news[this.newscounter].style.top =this.height-this.pos;

		this.news[prev].style.posTop=-this.pos ;
		this.news[prev].style.top =-this.pos;

		to = this.name+".tick()";

		this.timeHandler=setTimeout(to,this.turbo?1:this.speed);

	}

}



function cmsticker_pause()

{

	this.paused =true;

	this.turbo=false;

	this.pos=0;

	this.newscounter++;

	if(this.newscounter>=this.news.length) this.newscounter=0;



	this.running = false;

	to = this.name+".start()";

	this.timeHandler=setTimeout(to,this.waittime);

	

}



function cmsticker_stop()

{

	clearTimeout(this.timeHandler);

	this.running = false;

}



function cmsticker_cont()

{

	if(!this.running&&this.initialized) 

	{

		clearTimeout(this.timeHandler);

		if(this.paused)

			this.start();

		else

			this.tick();	

	}

	else if(this.paused)

		this.start();

	else

		this.turbo=true;

}

	



// function to evaluate position of objects



function findPosX(obj)

{

	var curleft = 0;

	if (obj.offsetParent)

	{

		while (obj.offsetParent)

		{

			curleft += obj.offsetLeft

			obj = obj.offsetParent;

		}

	}

	else if (obj.x)

		curleft += obj.x;

	return curleft;

}



function findPosY(obj)

{

	var curtop = 0;

	if (obj.offsetParent)

	{

		while (obj.offsetParent)

		{

			curtop += obj.offsetTop

			obj = obj.offsetParent;

		}

	}

	else if (obj.y)

		curtop += obj.y;

	return curtop;

}