var clipTop = 0;
var clipWidth = 380;
var clipBottom = 430;
var topper = 40;
var lyrheight = 0;
var time,amount,theTime,theHeight,DHTML;

var isDom = document.getElementById?true:false;
var isIE  = document.all?true:false;
var isNS4 = document.layers?true:false;

function init()
{
	DHTML = (document.getElementById || document.all || document.layers)
	if (!DHTML) return;
	var x = new getObj('szoveg');
	if (document.layers)
	{
		lyrheight = x.style.clip.bottom;
		lyrheight += 20;
		x.style.clip.top = clipTop;
		x.style.clip.left = 0;
		x.style.clip.right = clipWidth;
		x.style.clip.bottom = clipBottom;

	}
	else if (document.getElementById || document.all)
	{
		lyrheight = x.obj.offsetHeight;
		x.style.clip = 'rect('+clipTop+' '+clipWidth+' '+clipBottom+' 0)'
	}
}

function scrollayer(layername,amt,tim)
{
	if (!DHTML) return;
	thelayer = new getObj(layername);
	if (!thelayer) return;
	amount = amt;
	theTime = tim;
	realscroll();
}

function realscroll()
{
	if (!DHTML) return;
	clipTop += amount;
	clipBottom += amount;
	topper -= amount;
	if (clipTop < 0 || clipBottom > lyrheight)
	{
		clipTop -= amount;
		clipBottom -= amount;
		topper += amount;
		return;
	}
	if (document.getElementById || document.all)
	{
		clipstring = 'rect('+clipTop+' '+clipWidth+' '+clipBottom+' 0)'
		thelayer.style.clip = clipstring;
		thelayer.style.top = topper;
	}
	else if (document.layers)
	{
		thelayer.style.clip.top = clipTop;
		thelayer.style.clip.bottom = clipBottom;
		thelayer.style.top = topper;
	}
	time = setTimeout('realscroll()',theTime);
}

function stopScroll()
{
	if (time) clearTimeout(time);
}


function gotop()
{
	if (!DHTML) return;
	clipTop = 0;
	clipBottom = 430;
	topper = 40;
                var yy = new getObj('szoveg');
	if (document.getElementById || document.all)
	{
		clipstring = 'rect('+clipTop+' '+clipWidth+' '+clipBottom+' 0)'
		yy.style.clip = clipstring;
		yy.style.top = topper;
	}
	else if (document.layers)
	{
		yy.style.clip.top = clipTop;
		yy.style.clip.bottom = clipBottom;
		yy.style.top = topper;
	}

}


function scrollpont(lepes)
{
gotop();
scrollayer('szoveg',(lepes*175)-135,1000);
stopScroll();
}



function getObj(name)
{
  if (isDom)
  {
  	this.obj = document.getElementById(name);
	this.style = document.getElementById(name).style;
  }
 if (isIE)
  {
	this.obj = document.all[name];
	this.style = document.all[name].style;
  }
  if (isNS4)
  {
	this.obj = getObjNN4(document,name);
	this.style = this.obj;
  }
}

function getObjNN4(obj,name)
{
	var x = obj.layers;
	var foundLayer;
	for (var i=0;i<x.length;i++)
	{
		if (x[i].id == name)
		 	foundLayer = x[i];
		else if (x[i].layers.length)
			var tmp = getObjNN4(x[i],name);
		if (tmp) foundLayer = tmp;
	}
	return foundLayer;
}