function scrollingAD(_id, _width, _height, _bgColor, _direction, _delay, _pauseTime, _size, _isHover) {
							this.id              = _id;
							this.width           = _width;
							this.height          = _height;
							this.bgColor         = _bgColor;
							this.direction       = _direction;
							this.delay           = _delay;
							this.pauseTime       = _pauseTime;
							this.size            = _size;
							this.object          = null;
							this.isMove          = true;
							
							if((this.id == "") || (this.id == null)) {
								alert("必须输入对象的 ID 才能创建滚动区域！");
								this.isMove = false;
								return false;
							}
							
							if(document.getElementById(this.id)) {
								this.object = document.getElementById(this.id);
							} else {
								window.alert("滚动区域创建失败！\n请确认 " + this.id + " 是否拼写错误。");
								this.isMove = false;
								return false;
							}
						}
						scrollingAD.prototype.checkNumber = function(_attribute, defaultValue) {	
							if(isNaN(_attribute)) {
								return defaultValue;
							} else {
								return ((typeof(parseInt(_attribute)) == "number") ? parseInt(_attribute) : defaultValue);
							}
						}
						scrollingAD.prototype.move = function() {
							if(this.isMove == false) return false;
							
							var defaultWidth           = 200;
							var defaultHeight          = 50;
							var defaultDelay           = 20;
							var defaultPauseTime       = 6000;
							var defaultIsHover         = true;
							var defaultBgColor         = "transparent";
							var defaultDirection       = "up";
							
							this.width          = this.checkNumber(this.width, defaultWidth);
							this.height         = this.checkNumber(this.height, defaultHeight);
							this.delay          = this.checkNumber(this.delay, defaultDelay);
							this.pauseTime      = this.checkNumber(this.pauseTime, defaultPauseTime);
							this.isHover        = (typeof(this.isHover) == "boolean") ? this.isHover : defaultIsHover;
							
							if(this.direction == "left") {
								this.size       = this.checkNumber(this.size, this.width);
							} else {
								this.size       = this.checkNumber(this.size, this.height);
							}
							
							if((this.bgColor == null) || (typeof(this.bgColor) == undefined)) {
								this.bgColor = defaultBgColor;
							} else {
								this.bgColor = this.bgColor;
							}
							
							if((this.direction == null) || (typeof(this.direction) == undefined)) {
								this.direction = defaultDirection;	
							} else {
								this.direction = (this.direction.search(/(^up$)|(^left$)/gi) != -1) ? this.direction.toLowerCase() : defaultDirection;
							}
							
							// 创建滚动区域；
							with(this.object) {
								style.display         = "block";
								style.width           = this.width + "px";
								style.height          = this.height + "px";
								style.overflow        = "hidden";
								style.backgroundColor = this.bgColor;
							}
							
							if(this.direction == "up") {
								this.object.innerHTML = "<div id=\"" + this.id + "_mirror\">" + this.object.innerHTML + "</div>" + "<div>" + this.object.innerHTML + "</div><input type=\"hidden\" value=\"1\" id=\"" + this.id + "_isHover\" />";
							} else {
								this.object.innerHTML = "<span id=\"" + this.id + "_mirror\">" + this.object.innerHTML + "</span>" + "<span>" + this.object.innerHTML + "</span><input type=\"hidden\" value=\"1\" id=\"" + this.id + "_isHover\" />";
							}
								
							if(document.getElementById(this.id)) {
								var evalString;
								if(this.direction == "up") {
									evalString = "scrollToUp(\"" + this.id + "\", " + this.isHover + ", " + this.delay + ", " + this.size + ", " + this.pauseTime + ", 0) ";
								} else {
									evalString = "scrollToLeft(\"" + this.id + "\", " + this.isHover + ", " + this.delay + ", " + this.size + ", " + this.pauseTime + ", 0) ";
								}
								eval(evalString);
								
							} else {
								return false;
							}
							
							function pixelToNum(_string)	{
							//该函数用于去掉数值后面的px，并将之转化为数字。
								if(_string.slice(_string.length - 2) == "px") {
									return parseInt(_string.slice(0, (_string.length - 2)));
								} else  {
									return _string;
								}
							}
							
							function scrollToLeft(_id, _isHover, _delay, _size, _pauseTime, _s) {
								var obj = document.getElementById(_id);
								var mirror = document.getElementById(_id + "_mirror");	
								
								if(_size*(1 + parseInt(_s)) + pixelToNum(mirror.style.marginLeft) >= 0) {
									var evalString =_id + "_timer = window.setTimeout(function() {scrollToLeft(\"" + _id + "\", " + _isHover + ", " + _delay + ", " + _size + ", " + _pauseTime + ", " + _s + ");}, " + _delay + ")";
								
									if(_isHover) {
										mirror.onmouseover = function() {document.getElementById(_id + "_isHover").value = 0;}
										mirror.onmouseout  = function() {document.getElementById(_id + "_isHover").value = 1;}
										var step = parseInt(document.getElementById(_id + "_isHover").value);
										mirror.style.marginLeft = (pixelToNum(mirror.style.marginLeft) - step) + "px";	
										eval("var " + evalString);
									} else {				
										mirror.style.marginLeft = (pixelToNum(mirror.style.marginLeft) - 1) + "px";	
										eval("var " + evalString);
									}
								} else {
									if(mirror.offsetWidth + pixelToNum(mirror.style.marginLeft) >= 0) {
										_s += 1;
										window.setTimeout(function() {scrollToLeft(_id, _isHover, _delay, _size, _pauseTime, _s)}, _pauseTime);
									} else {
										mirror.style.marginLeft = mirror.offsetWidth + pixelToNum(mirror.style.marginLeft) + "px";;
										window.setTimeout(function() {scrollToLeft(_id, _isHover, _delay, _size, _pauseTime, 0)}, _pauseTime);
									}
								}
								
							}
							function scrollToUp(_id, _isHover, _delay, _size, _pauseTime, _s) {
								var obj = document.getElementById(_id);
								var mirror = document.getElementById(_id + "_mirror");	
								
								if(_size*(1 + parseInt(_s)) + pixelToNum(mirror.style.marginTop) >= 0) {
									var evalString =_id + "_timer = window.setTimeout(function() {scrollToUp(\"" + _id + "\", " + _isHover + ", " + _delay + ", " + _size + ", " + _pauseTime + ", " + _s + ");}, " + _delay + ")";
								
									if(_isHover) {
										mirror.onmouseover = function() {document.getElementById(_id + "_isHover").value = 0;}
										mirror.onmouseout  = function() {document.getElementById(_id + "_isHover").value = 1;}
										var step = parseInt(document.getElementById(_id + "_isHover").value);
										mirror.style.marginTop = (pixelToNum(mirror.style.marginTop) - step) + "px";	
										eval("var " + evalString);
									} else {				
										mirror.style.marginTop = (pixelToNum(mirror.style.marginTop) - 1) + "px";	
										eval("var " + evalString);
									}
								} else {
									if(mirror.offsetHeight + pixelToNum(mirror.style.marginTop) >= 0) {
										_s += 1;
										window.setTimeout(function() {scrollToUp(_id, _isHover, _delay, _size, _pauseTime, _s)}, _pauseTime);
									} else {
										mirror.style.marginTop = mirror.offsetHeight + pixelToNum(mirror.style.marginTop) + "px";;
										window.setTimeout(function() {scrollToUp(_id, _isHover, _delay, _size, _pauseTime, 0)}, _pauseTime);
									}
								}
							}
						}