var downLayerId;
var dropDegree = 40; //스크롤 속도
var doDirect;
var DirectTerm = 4000; //스크롤 지연시간
var curDropIdx = 0;

function DirectDown()
{
	clearInterval(doDirect);
	clearInterval(downLayerId);

	for(i = curDropIdx ;i < document.all["DropHit"].length + curDropIdx;i++)
	{
		document.all["DropHit"][i%document.all["DropHit"].length].style.posLeft = document.all["DropHit"][i%document.all["DropHit"].length].style.posWidth * (-1*((i-curDropIdx)%document.all["DropHit"].length));
	}
	var temp = 'setInterval("DownLayer()",20)';
	downLayerId = eval(temp);
	direction = "down";
}

function DownLayer()
{
	if(document.all["DropHit"][curDropIdx].style.posLeft < document.all["DropHit"][curDropIdx].style.posWidth)
	{
		for(j = curDropIdx ;j < document.all["DropHit"].length + curDropIdx;j++)
		{
			document.all["DropHit"][j%document.all["DropHit"].length].style.posLeft += dropDegree;
		}
	}
	else
	{
		clearInterval(downLayerId);
		for(j = curDropIdx ;j < document.all["DropHit"].length + curDropIdx;j++)
		{
			document.all["DropHit"][j%document.all["DropHit"].length].style.posLeft = document.all["DropHit"][j%document.all["DropHit"].length].style.posWidth *((-1*((j-curDropIdx)%document.all["DropHit"].length))+1);
		}
		curDropIdx = (curDropIdx + 1) ;
		curDropIdx = curDropIdx > document.all["DropHit"].length-1 ? curDropIdx%document.all["DropHit"].length:curDropIdx;
		var temp = 'setInterval("DirectDown()",DirectTerm)';
		doDirect = eval(temp);
	}
}

function DirectUp()
{
	clearInterval(doDirect);
	clearInterval(downLayerId);
	var tempIdx = 0;
	for(i = 0;i<document.all["DropHit"].length;i++)
	{
		tempIdx = (document.all["DropHit"].length + curDropIdx - i) %document.all["DropHit"].length;
		document.all["DropHit"][tempIdx].style.posLeft = i*document.all["DropHit"][tempIdx].style.posWidth;
	}
	var temp = 'setInterval("UpLayer()",20)';
	downLayerId = eval(temp);
	direction = "up";
}

function UpLayer()
{
	var tempIdx = 0;
	if(document.all["DropHit"][curDropIdx].style.posLeft < document.all["DropHit"][curDropIdx].style.posWidth && document.all["DropHit"][curDropIdx].style.posLeft > document.all["DropHit"][curDropIdx].style.posWidth * (-1))
	{
		for(j = 0 ;j < document.all["DropHit"].length;j++)
		{
			tempIdx = (document.all["DropHit"].length + curDropIdx - j) %document.all["DropHit"].length;
			document.all["DropHit"][tempIdx].style.posLeft -= dropDegree;
		}
	}
	else
	{
		clearInterval(downLayerId);
		for(j = 0;j<document.all["DropHit"].length;j++)
		{
			tempIdx = (document.all["DropHit"].length + curDropIdx - j) % document.all["DropHit"].length;
			document.all["DropHit"][tempIdx].style.posLeft = (j-1)*(document.all["DropHit"][tempIdx].style.posWidth);
		}
		curDropIdx = (curDropIdx - 1) ;
		curDropIdx = curDropIdx < 0 ? document.all["DropHit"].length-1:curDropIdx;
		var temp = 'setInterval("DirectUp()",DirectTerm)';
		doDirect = eval(temp);
	}
}

function StartDown()
{
	setTimeout("DownLayer()", 20);
}