function Scroller(x, y, width, height, border, padding) {

    this.x = x;
    this.y = y;
    this.width = width;
    this.height = height;
    this.border = border;
    this.padding = padding;

    this.items = new Array();
    this.created = false;

    // 기본색상 설정

    this.fgColor = "#000000";
    this.bgColor = "#ffffff";
    this.bdColor = "#000000";

    // 기본글꼴 설정

    this.fontFace = "Arial,Helvetica";
    this.fontSize = "2";

    // 기본 스크롤 타이밍값 설정

    this.speed = 50;
    this.pauseTime = 2000;

    // 메소드 정의

    this.setColors = scrollerSetColors;
    this.setFont = scrollerSetFont;
    this.setSpeed = scrollerSetSpeed;
    this.setPause = scrollersetPause;
    this.addItem = scrollerAddItem;
    this.create = scrollerCreate;
    this.show = scrollerShow;
    this.hide = scrollerHide;
    this.moveTo = scrollerMoveTo;
    this.moveBy = scrollerMoveBy;
    this.getzIndex = scrollerGetzIndex;
    this.setzIndex = scrollerSetzIndex;
    this.stop = scrollerStop;
    this.start = scrollerStart;
}

//*****************************************************************************
// 스크롤러 메소드
//*****************************************************************************

function scrollerSetColors(fgcolor, bgcolor, bdcolor) {

    if (this.created) {
        alert("스크롤러가 이미 생성 되었습니다.");
        return;
    }
    this.fgColor = fgcolor;
    this.bgColor = bgcolor;
    this.bdColor = bdcolor;
}

function scrollerSetFont(face, size) {

    if (this.created) {
        alert("스크롤러가 이미 생성 되었습니다.");
        return;
    }
    this.fontFace = face;
    this.fontSize = size;
}

function scrollerSetSpeed(pps) {

    if (this.created) {
        alert("스크롤러가 이미 생성 되었습니다.");
        return;
    }
    this.speed = pps;
}

function scrollersetPause(ms) {

    if (this.created) {
        alert("스크롤러가 이미 생성 되었습니다.");
        return;
    }
    this.pauseTime = ms;
}

function scrollerAddItem(str) {

    if (this.created) {
        alert("스크롤러가 이미 생성 되었습니다.");
        return;
    }
    this.items[this.items.length] = str;
}

function scrollerCreate() {

    var start, end;
    var str;
    var i, j;
    var x, y;

    if (!isMinNS4 && !isMinIE4)
        return;

    // 첫번째 스크롤러에서 인터벌 타이머 시작

    if (scrollerList.length == 0)
        setInterval('scrollerGoUp()', scrollerInterval);

    // 스크롤러를 한번만 생성

    if (this.created) {
        alert("스크롤러가 이미 생성 되었습니다.");
        return;
    }
    this.created = true;

    this.items[this.items.length] = this.items[0];

    start = '<table border=0'
        + ' cellpadding=' + (this.padding + this.border)
        + ' cellspacing=0'
        + ' width=' + this.width
        + ' height=' + this.height + '>'
        + '<tr><td>'
        + '<font'
        + ' color="' + this.fgColor + '"'
        + ' face="' + this.fontFace + '"'
        + ' size=' + this.fontSize + '>';
    end = '</font></td></tr></table>';

    // 레이어 작성

    if (isMinNS4) {
        this.baseLayer = new Layer(this.width);
        this.scrollLayer = new Layer(this.width, this.baseLayer);
        this.scrollLayer.visibility = "inherit";
        this.itemLayers = new Array();
        for (i = 0; i < this.items.length; i++) {
            this.itemLayers[i] = new Layer(this.width, this.scrollLayer);
            this.itemLayers[i].document.open();
            this.itemLayers[i].document.writeln(start + this.items[i] + end);
            this.itemLayers[i].document.close();
            this.itemLayers[i].visibility = "inherit";
        }

        // 배경색 설정

        setBgColor(this.baseLayer, this.bdColor);
        setBgColor(this.scrollLayer, this.bgColor);
    }

    if (isMinIE4) {
        i = scrollerList.length;
        str = '<div id="scroller' + i + '_baseLayer"'
        + ' style="position:absolute;'
        //+ ' background-color:' + this.bdColor + ';'
        + ' width:' + this.width + 'px;'
        + ' height:' + this.height + 'px;'
        + ' overflow:hidden;'
        + ' visibility:hidden;">\n'
        + '<div id="scroller' + i + '_scrollLayer"'
        + ' style="position:absolute;filter:'
        + ' background-color: ' + this.bgColor + ';'
        + ' width:' + this.width + 'px;'
        + ' height:' + (this.height * this.items.length) + 'px;'
        + ' visibility:inherit;">\n';
        for (j = 0; j < this.items.length; j++) {
            str += '<div id="scroller' + i + '_itemLayers' + j + '"'
          + ' style="position:absolute;'
          + ' width:' + this.width + 'px;'
          + ' height:' + this.height + 'px;'
          + ' visibility:inherit;">\n'
          + start + this.items[j] + end
          + '</div>\n';
        }
        str += '</div>\n'
        + '</div>\n';

        if (!isMinIE5) {
            x = getPageScrollX();
            y = getPageScrollY();
            window.scrollTo(getPageWidth(), getPageHeight());
        }
        document.body.insertAdjacentHTML("beforeEnd", str);
        if (!isMinIE5)
            window.scrollTo(x, y);

        // 각 레이어의 핸들러 구함

        this.baseLayer = getLayer("scroller" + i + "_baseLayer");
        this.scrollLayer = getLayer("scroller" + i + "_scrollLayer");
        this.itemLayers = new Array();
        for (j = 0; j < this.items.length; j++)
            this.itemLayers[j] = getLayer("scroller" + i + "_itemLayers" + j);
    }

    moveLayerTo(this.baseLayer, this.x, this.y);
    clipLayer(this.baseLayer, 0, 0, this.width, this.height);
    moveLayerTo(this.scrollLayer, this.border, this.border);
    clipLayer(this.scrollLayer, 0, 0,
            this.width - 2 * this.border, this.height - 2 * this.border);

    x = 0;
    y = 0;
    for (i = 0; i < this.items.length; i++) {
        moveLayerTo(this.itemLayers[i], x, y);
        clipLayer(this.itemLayers[i], 0, 0, this.width, this.height);
        y += this.height;
    }

    this.stopped = false;
    this.currentY = 0;
    this.stepY = this.speed / (1000 / scrollerInterval);
    this.stepY = Math.min(this.height, this.stepY);
    this.nextY = this.height;
    this.maxY = this.height * (this.items.length - 1);
    this.paused = true;
    this.counter = 0;

    scrollerList[scrollerList.length] = this;

    showLayer(this.baseLayer);
}

function scrollerShow() {

    if (this.created)
        showLayer(this.baseLayer);
}

function scrollerHide() {

    if (this.created)
        hideLayer(this.baseLayer);
}

function scrollerMoveTo(x, y) {

    if (this.created)
        moveLayerTo(this.baseLayer, x, y);
}

function scrollerMoveBy(dx, dy) {

    if (this.created)
        moveLayerBy(this.baseLayer, dx, dy);
}

function scrollerGetzIndex() {

    if (this.created)
        return (getzIndex(this.baseLayer));
    else
        return (0);
}

function scrollerSetzIndex(z) {

    if (this.created)
        setzIndex(this.baseLayer, z);
}

function scrollerStart() {

    this.stopped = false;
}

function scrollerStop() {

    this.stopped = true;
}

var scrollerList = new Array();
var scrollerInterval = 20;

function scrollerGoUp() {

    var i;

    for (i = 0; i < scrollerList.length; i++) {

        if (scrollerList[i].stopped);

        else if (scrollerList[i].paused) {
            scrollerList[i].counter += scrollerInterval;
            if (scrollerList[i].counter > scrollerList[i].pauseTime)
                scrollerList[i].paused = false;
        }

        else {
            scrollerList[i].currentY += scrollerList[i].stepY;

            if (scrollerList[i].currentY >= scrollerList[i].nextY) {
                scrollerList[i].paused = true;
                scrollerList[i].counter = 0;
                scrollerList[i].currentY = scrollerList[i].nextY;
                scrollerList[i].nextY += scrollerList[i].height;
            }

            if (scrollerList[i].currentY >= scrollerList[i].maxY) {
                scrollerList[i].currentY -= scrollerList[i].maxY;
                scrollerList[i].nextY = scrollerList[i].height;
            }
            scrollLayerTo(scrollerList[i].scrollLayer,
                    0, Math.round(scrollerList[i].currentY),
                    false);
        }
    }
}

function scrollerGoDown() {
    
    var i;

    for (i = 0; i < scrollerList.length; i++) {

        if (scrollerList[i].stopped);

        else if (scrollerList[i].paused) {
            scrollerList[i].counter -= scrollerInterval;
            if (scrollerList[i].counter < scrollerList[i].pauseTime)
                scrollerList[i].paused = false;
        }

        else {
            scrollerList[i].currentY -= scrollerList[i].stepY;

            if (scrollerList[i].currentY <= scrollerList[i].nextY) {
                scrollerList[i].paused = true;
                scrollerList[i].counter = 0;
                scrollerList[i].currentY = scrollerList[i].nextY;
                scrollerList[i].nextY -= scrollerList[i].height;
            }

            if (scrollerList[i].currentY <= scrollerList[i].maxY) {
                scrollerList[i].currentY == scrollerList[i].maxY;
                scrollerList[i].nextY = scrollerList[i].height;
            }
            scrollLayerTo(scrollerList[i].scrollLayer,
                    0, Math.round(scrollerList[i].currentY),
                    false);
        }
    }
}

var origWidth;
var origHeight;

if (isMinNS4) {
    origWidth = window.innerWidth;
    origHeight = window.innerHeight;
}
window.onresize = scrollerReload;

function scrollerReload() {

    if (isMinNS4 && origWidth == window.innerWidth && origHeight == window.innerHeight)
        return;
    window.location.href = window.location.href;
}