var c = 0;
var t;
var contheight	= 290;



function scrolldown() 
	{
	var newsblock	= document.getElementById("news");
	var curpos		= newsblock.style.marginTop;
	var newsh		= newsblock.offsetHeight;
	var ntnewsh	= newsh-contheight;
	var tnewsh	= "-"+ntnewsh+"px";
	
	if (curpos == "0px")
	{
		d=c--;
		newsblock.style.marginTop=d+"px";
  		t=setTimeout("scrolldown()",0);
	}
	else if (curpos == tnewsh)
	{
		newsblock.style.marginTop=tnewsh;
	}
	else
	{
		d=c--;
		newsblock.style.marginTop=d+"px";
  		t=setTimeout("scrolldown()",0);
	}
}

function scrollup() 
	{
	var newsblock	= document.getElementById("news");
	var curpos = newsblock.style.marginTop;
	var newsh = newsblock.offsetHeight;
	var ntnewsh = newsh-contheight;
	var tnewsh = "-"+ntnewsh+"px";
	
	if (curpos == tnewsh)
	{
		d=c++;
		newsblock.style.marginTop=d+"px";
  		t=setTimeout("scrollup()",0);
	}
	else if (curpos == "0px")
	{
		newsblock.style.marginTop="0px";
	}
	else
	{
		d=c++;
		newsblock.style.marginTop=d+"px";
  		t=setTimeout("scrollup()",0);
	}
}

function clearscroll() 
	{
	clearTimeout(t);
	}