var AutoScroll_cont = function (a,b,c,d){
	this.frameId = a;
	this.frameWidth = b;//滚动框宽度
	this.speed = c; //移动速度(单位毫秒，越小越快)
	this.space = d; //每次移动像素(单位px，越大越快)
	this._timeoutObj = null;
	}
	AutoScroll_cont.prototype={
	$ : function(id){return document.getElementById(id)},
	begin : function(){

		if(!this.$(this.frameId)){return};
		this.$(this.frameId).style.overflow = "hidden";
		this.$(this.frameId).style.width = this.frameWidth + "px";
		this._bigDiv = document.createElement("div");
		this._bigDiv.style.zoom = 1;
		this._bigDiv.style.overflow = "hidden";
		this._bigDiv.style.width = "32765px";
		this.div1 = document.createElement("div");
		this.div2 = document.createElement("div");
		this.div1.style.cssFloat = this.div1.style.styleFloat = this.div2.style.cssFloat = this.div2.style.styleFloat = "left";
		tempHTML = this.$(this.frameId).innerHTML;
		this.$(this.frameId).innerHTML = "";
		this.$(this.frameId).appendChild(this._bigDiv);
		this._bigDiv.appendChild(this.div1);
		this._bigDiv.appendChild(this.div2);
		this.div1.innerHTML = this.div2.innerHTML = tempHTML;

		var tempThis = this;
		this.$(this.frameId).onmouseover = function(){tempThis.stop()};
		this.$(this.frameId).onmouseout = function(){tempThis.play()};
		this.play();
	},
	play : function(){
		var tempThis = this;
		clearInterval(this._timeoutObj);
		this._timeoutObj = setInterval(function(){tempThis.scrollNext()},this.speed);
	},
	stop : function(){
		clearInterval(this._timeoutObj);
	},
	scrollNext : function(){
	
		try{this.$(this.frameId).scrollLeft += this.space;}catch(e){this.stop();return;};
		if(this.$(this.frameId).scrollLeft > this.div1.scrollWidth){
			this.$(this.frameId).scrollLeft = this.$(this.frameId).scrollLeft - this.div1.scrollWidth;
		};
	}
};