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
                               }
                           }
            };


            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);

                //初始化
                this.initialize = function() {
                    if (!this.scrollContId) { throw new Error("必须指定scrollContId."); return };
                    this.scrollContDiv = sina.$(this.scrollContId); if (!this.scrollContDiv) {
                        throw new Error("scrollContId不是正确的对象.(scrollContId = \"" + this.scrollContId + "\")"); return
                    };
                    this.scrollContDiv.style.width = this.frameWidth + "px"; //宽度
                    this.scrollContDiv.style.overflow = "hidden";           //隐藏多余图片
                    this.listDiv01.innerHTML = this.listDiv02.innerHTML = this.scrollContDiv.innerHTML;
                    this.scrollContDiv.innerHTML = "";
                    this.scrollContDiv.appendChild(this.stripDiv); //添加层
                    this.stripDiv.appendChild(this.listDiv01);
                    this.stripDiv.appendChild(this.listDiv02);
                    this.stripDiv.style.overflow = "hidden";
                    this.stripDiv.style.zoom = "1";
                    this.stripDiv.style.width = "2826px";
                    this.listDiv01.style.cssFloat = "left";
                    this.listDiv02.style.cssFloat = "left";
                    sina.addEvent(this.scrollContDiv, "mouseover", Function("ScrollPic.childs[" + this.ID + "].stop()"));
                    sina.addEvent(this.scrollContDiv, "mouseout", Function("ScrollPic.childs[" + this.ID + "].play()"));
                    if (this.arrLeftId) {
                        this.arrLeftObj = sina.$(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 + ")"))
                            }
                        }
                    };
                    //自动播放
                    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)
                };
                //移动
                this.move = function(num, quick) {
                    var thisMove = num / 5;
                    if (!quick) {//指定最慢的速度为1
                        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) {
                        var w = $(this.scrollContDiv).find("table").attr("scrollWidth");
                        if (this.scrollContDiv.scrollLeft + thisMove >= w) {
                            this.scrollContDiv.scrollLeft = this.scrollContDiv.scrollLeft + thisMove - w
                        }
                        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 }
                    }
                }
            };