//  ½ºÅ©·Ñ
var downLayerId; 
var dropDegree = 3; 
var doDirect;
var DirectTerm = 2400;
var curDropIdx = 0;

function DropHitInit()
{
	var tempIdx = 0;
	if (document.all["DropHit"].length == null)
	{
	}else{

		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.posTop = i*document.all["DropHit"][tempIdx].style.posHeight;
			
		}	
	}
} 
function DirectDown() 
{
	clearInterval(doDirect);
	clearInterval(downLayerId);
	if (document.all["DropHit"].length == null)
	{
	}else{
		for(i = curDropIdx ;i < document.all["DropHit"].length + curDropIdx;i++)
		{
			document.all["DropHit"][i%document.all["DropHit"].length].style.posTop = document.all["DropHit"][i%document.all["DropHit"].length].style.posHeight * (-1*((i-curDropIdx)%document.all["DropHit"].length));
		}
		var temp = 'setInterval("DownLayer()",10)';
		downLayerId = eval(temp);
		direction = "down";
	}
}

function DownLayer()
{
	if(document.all["DropHit"][curDropIdx].style.posTop < document.all["DropHit"][curDropIdx].style.posHeight)
	{
		for(j = curDropIdx ;j < document.all["DropHit"].length + curDropIdx;j++)
		{ 
			document.all["DropHit"][j%document.all["DropHit"].length].style.posTop += dropDegree;
		}
	}
	else
	{
		clearInterval(downLayerId);
		for(j = curDropIdx ;j < document.all["DropHit"].length + curDropIdx;j++)
		{
			document.all["DropHit"][j%document.all["DropHit"].length].style.posTop = document.all["DropHit"][j%document.all["DropHit"].length].style.posHeight *((-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;
	if (document.all["DropHit"].length == null)
	{
	}else{

		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.posTop = i*document.all["DropHit"][tempIdx].style.posHeight;
			
		}		
		var temp = 'setInterval("UpLayer()",10)';
		downLayerId = eval(temp);
		direction = "up";	
	}
}

function UpLayer()
{
	var tempIdx = 0;
	if(document.all["DropHit"][curDropIdx].style.posTop < document.all["DropHit"][curDropIdx].style.posHeight && document.all["DropHit"][curDropIdx].style.posTop > document.all["DropHit"][curDropIdx].style.posHeight * (-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.posTop -= 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.posTop = (j-1)*(document.all["DropHit"][tempIdx].style.posHeight);
		}
		curDropIdx = (curDropIdx - 1) ;
		curDropIdx = curDropIdx < 0 ? document.all["DropHit"].length-1:curDropIdx;
		var temp = 'setInterval("DirectUp()",DirectTerm)';
		doDirect = eval(temp);
	}
}
function hiddenLayer(x) {
 document.all[x].style.display = "none";
}
function showLayer(x) {
 document.all[x].style.display = "";
}