var downLayerId;
var dropDegree = 1; //½ºÅ©·Ñ ¼Óµµ
var doDirect;
var DirectTerm = 5000; //½ºÅ©·Ñ Áö¿¬½Ã°£
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.posTop = document.all["DropHit"][i%document.all["DropHit"].length].style.posHeight * (-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.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;
        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()",20)';
        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);
        }
}