var sina = { $: function(objName) {
    if (document.getElementById) { return eval('document.getElementById("' + objName + '")') }
    else { return eval('document.all.' + objName) }
},
    isIE: navigator.appVersion.indexOf("MSIE") != -1 ? true : false,
    addEvent: function(l, i, I) {
        if (l.attachEvent) { l.attachEvent("on" + i, I) }
        else { l.addEventListener(i, I, false) }
    },
    delEvent: function(l, i, I) {
        if (l.detachEvent) { l.detachEvent("on" + i, I) }
        else { l.removeEventListener(i, I, false) }
    },
    readCookie: function(O) {
        var o = "", l = O + "=";
        if (document.cookie.length > 0) {
            var i = document.cookie.indexOf(l); if (i != -1) {
                i += l.length;
                var I = document.cookie.indexOf(";", i);
                if (I == -1) I = document.cookie.length;
                o = unescape(document.cookie.substring(i, I))
            }
        };
        return o
    },
    writeCookie: function(i, l, o, c) {
        var O = "", I = "";
        if (o != null) { O = new Date((new Date).getTime() + o * 3600000); O = "; expires=" + O.toGMTString() };
        if (c != null) { I = ";domain=" + c };
        document.cookie = i + "=" + escape(l) + O + I
    },
    readStyle: function(I, l) {
        if (I.style[l]) { return I.style[l] }
        else if (I.currentStyle) { return I.currentStyle[l] }
        else if (document.defaultView && document.defaultView.getComputedStyle) {
            var i = document.defaultView.getComputedStyle(I, null);
            return i.getPropertyValue(l)
        } else { return null }
    }
};

//滚动图片构造函数
//UI&UE Dept. mengjia
//080623
function ScrollPic(scrollContId, arrLeftId, arrRightId, dotListId) {
    this.scrollContId = scrollContId;
    this.arrLeftId = arrLeftId;
    this.arrRightId = arrRightId;
    this.dotListId = dotListId;
    this.dotClassName = "dotItem";
    this.dotOnClassName = "dotItemOn";
    this.dotObjArr = [];
    this.pageWidth = 0;
    this.frameWidth = 0;
    this.speed = 10; this.space = 10;
    this.pageIndex = 0;
    this.autoPlay = true;
    this.autoPlayTime = 5;
    var _autoTimeObj, _scrollTimeObj, _state = "ready";
    this.stripDiv = document.createElement("DIV");
    this.listDiv01 = document.createElement("DIV");
    this.listDiv02 = document.createElement("DIV");
    if (!ScrollPic.childs) { ScrollPic.childs = [] };
    this.ID = ScrollPic.childs.length;
    ScrollPic.childs.push(this);
    this.initialize = function() {
        if (!this.scrollContId) {
            throw new Error("必须指定scrollContId."); return
        };
        this.scrollContDiv = sina.$(this.scrollContId);
        if (!this.scrollContDiv) {
            throw new Error("scrollContId不是正确的对象.(scrollContId = \"" + this.scrollContId + "\")"); return
        };
        this.scrollContDiv.style.width = this.frameWidth + "px";
        this.scrollContDiv.style.overflow = "hidden";
        this.listDiv01.innerHTML = this.listDiv02.innerHTML = this.scrollContDiv.innerHTML;
        this.scrollContDiv.innerHTML = "";
        this.scrollContDiv.appendChild(this.stripDiv);
        this.stripDiv.appendChild(this.listDiv01);
        this.stripDiv.appendChild(this.listDiv02);
        this.stripDiv.style.overflow = "hidden";
        this.stripDiv.style.zoom = "1";
        this.stripDiv.style.width = "32766px";
        this.listDiv01.style.cssFloat = "left";
        this.listDiv02.style.cssFloat = "left";
        sina.addEvent(this.scrollContDiv, "mouseover", Function("ScrollPic.childs[" + this.ID + "].stop()"));
        sina.addEvent(this.scrollContDiv, "mouseout", Function("ScrollPic.childs[" + this.ID + "].play()"));
        if (this.arrLeftId) {
            this.arrLeftObj = sina.$(this.arrLeftId);
            if (this.arrLeftObj) {
                sina.addEvent(this.arrLeftObj, "mousedown", Function("ScrollPic.childs[" + this.ID + "].rightMouseDown()"));
                sina.addEvent(this.arrLeftObj, "mouseup", Function("ScrollPic.childs[" + this.ID + "].rightEnd()"));
                sina.addEvent(this.arrLeftObj, "mouseout", Function("ScrollPic.childs[" + this.ID + "].rightEnd()"))
            }
        };
        if (this.arrRightId) {
            this.arrRightObj = sina.$(this.arrRightId);
            if (this.arrRightObj) {
                sina.addEvent(this.arrRightObj, "mousedown", Function("ScrollPic.childs[" + this.ID + "].leftMouseDown()"));
                sina.addEvent(this.arrRightObj, "mouseup", Function("ScrollPic.childs[" + this.ID + "].leftEnd()"));
                sina.addEvent(this.arrRightObj, "mouseout", Function("ScrollPic.childs[" + this.ID + "].leftEnd()"))
            }
        };
        if (this.dotListId) {
            this.dotListObj = sina.$(this.dotListId);
            if (this.dotListObj) {
                var pages = Math.round(this.listDiv01.offsetWidth / this.frameWidth + 0.4), i, tempObj;
                for (i = 0; i < pages; i++) {
                    tempObj = document.createElement("span");
                    this.dotListObj.appendChild(tempObj);
                    this.dotObjArr.push(tempObj);
                    if (i == this.pageIndex) { tempObj.className = this.dotClassName }
                    else { tempObj.className = this.dotOnClassName };
                    tempObj.title = "第" + (i + 1) + "页";
                    sina.addEvent(tempObj, "click", Function("ScrollPic.childs[" + this.ID + "].pageTo(" + i + ")"))
                }
            }
        };
        if (this.autoPlay) { this.play() }
    };
    this.leftMouseDown = function() {
        if (_state != "ready") { return };
        _state = "floating";
        _scrollTimeObj = setInterval("ScrollPic.childs[" + this.ID + "].moveLeft()", this.speed)
    };
    this.rightMouseDown = function() {
        if (_state != "ready") { return };
        _state = "floating"; _scrollTimeObj = setInterval("ScrollPic.childs[" + this.ID + "].moveRight()", this.speed)
    };
    this.moveLeft = function() {
        if (this.scrollContDiv.scrollLeft + this.space >= this.listDiv01.scrollWidth) {
            this.scrollContDiv.scrollLeft = this.scrollContDiv.scrollLeft + this.space - this.listDiv01.scrollWidth
        }
        else { this.scrollContDiv.scrollLeft += this.space }; this.accountPageIndex()
    };
    this.moveRight = function() {
        if (this.scrollContDiv.scrollLeft - this.space <= 0) {
            this.scrollContDiv.scrollLeft = this.listDiv01.scrollWidth + this.scrollContDiv.scrollLeft - this.space
        }
        else { this.scrollContDiv.scrollLeft -= this.space }; this.accountPageIndex()
    };
    this.leftEnd = function() {
        if (_state != "floating") { return };
        _state = "stoping"; clearInterval(_scrollTimeObj);
        var fill = this.pageWidth - this.scrollContDiv.scrollLeft % this.pageWidth; this.move(fill)
    };
    this.rightEnd = function() {
        if (_state != "floating") { return };
        _state = "stoping"; clearInterval(_scrollTimeObj);

        var fill = -this.scrollContDiv.scrollLeft % this.pageWidth; this.move(fill)
    };
    this.move = function(num, quick) {
        var thisMove = num / 5;
        if (!quick) {
            if (thisMove > this.space) { thisMove = this.space };
            if (thisMove < -this.space) { thisMove = -this.space }
        };
        if (Math.abs(thisMove) < 1 && thisMove != 0) { thisMove = thisMove >= 0 ? 1 : -1 }
        else { thisMove = Math.round(thisMove) };
        var temp = this.scrollContDiv.scrollLeft + thisMove; if (thisMove > 0) {
            if (this.scrollContDiv.scrollLeft + thisMove >= this.listDiv01.scrollWidth) {

                this.scrollContDiv.scrollLeft = this.scrollContDiv.scrollLeft + thisMove - this.listDiv01.scrollWidth
            }
            else { this.scrollContDiv.scrollLeft += thisMove }
        }
        else {
            if (this.scrollContDiv.scrollLeft - thisMove <= 0) {
                this.scrollContDiv.scrollLeft = this.listDiv01.scrollWidth + this.scrollContDiv.scrollLeft - thisMove
            }
            else { this.scrollContDiv.scrollLeft += thisMove }
        }; num -= thisMove;
        if (Math.abs(num) == 0) {
            _state = "ready";
            if (this.autoPlay) { this.play() }; this.accountPageIndex(); return
        }
        else { this.accountPageIndex(); setTimeout("ScrollPic.childs[" + this.ID + "].move(" + num + "," + quick + ")", this.speed) }
    };
    this.next = function() {
        if (_state != "ready") { return };
        _state = "stoping"; this.move(this.pageWidth, true)
    };
    this.play = function() {
        if (!this.autoPlay) { return };
        clearInterval(_autoTimeObj); _autoTimeObj = setInterval("ScrollPic.childs[" + this.ID + "].next()",
                                     this.autoPlayTime * 1000)
    }; this.stop = function() { clearInterval(_autoTimeObj) };
    this.pageTo = function(num) {
        if (_state != "ready") { return };
        _state = "stoping"; var fill = num * this.frameWidth - this.scrollContDiv.scrollLeft;
        this.move(fill, true)
    };
    this.accountPageIndex = function() {
        this.pageIndex = Math.round(this.scrollContDiv.scrollLeft / this.frameWidth);
        if (this.pageIndex > Math.round(this.listDiv01.offsetWidth / this.frameWidth + 0.4) - 1) {
            this.pageIndex = 0
        }; var i; for (i = 0; i < this.dotObjArr.length; i++) {
            if (i == this.pageIndex) { this.dotObjArr[i].className = this.dotClassName }
            else { this.dotObjArr[i].className = this.dotOnClassName }
        }
    }

};