//左右无缝滚动
function ScrollLeftRight(divId, theType){
	this.divId = divId;
	this.oneWidth = 0;
	this.LiArray = null;
	this.mainObj = null;
	this.beginObj = null;
	this.endObj = null;
	this.timmer = null;
	this.speed = 20;//滚动速度，越大越慢，请不要调得过小
	this.theType = theType;//left向左 right向右
	this.indexaaaaa=0;
}

//初始化
ScrollLeftRight.prototype.Init = function(){
	this.LiArray = $("#" + this.divId + " .list li");
	this.oneWidth = $(this.LiArray[0]).width();
	if (($("#" + this.divId + " .list").width()) > this.LiArray.length * this.oneWidth) {
		return;//如果LI还没有宽带的一半则不实现滚动，也不复制层(已经包含了没有LI)
	}
	this.MakeHtml();
	this.BindEvt();
}

//设置HTML
ScrollLeftRight.prototype.MakeHtml = function(){
	var tempHtml = "";
	tempHtml += "<div class=\"extendMain\"><div class=\"extendWidth\">";
	tempHtml += "<div class=\"extendBegin\">" + $("#" + this.divId + " .list").html() + "</div>";
	tempHtml += "<div class=\"extendEnd\">" + $("#" + this.divId + " .list").html() + "</div>";
	tempHtml += "</div></div>";
	$("#" + this.divId + " .list").html(tempHtml);
	var tempWidth = $("#" + this.divId + " .list").width();
	var tempHeight = $("#" + this.divId + " .list").height();
	$("#" + this.divId + " .list .extendMain").css({
		"width": tempWidth + "px",
		"height": tempHeight + "px",
		"overflow": "hidden"
	});
	$("#" + this.divId + " .list .extendWidth").css({
		"width": parseInt(this.LiArray.length * this.oneWidth * 2, 10) + "px",
		"height": tempHeight + "px",
		"overflow": "hidden"
	});
	$("#" + this.divId + " .list .extendBegin,#" + this.divId + " .list .extendEnd,#" + this.divId + " .list .extendBegin ul,#" + this.divId + " .list .extendEnd ul").css({
		"width": parseInt(this.LiArray.length * this.oneWidth, 10) + "px",
		"height": tempHeight + "px",
		"overflow": "hidden",
		"float": "left"
	});
	this.mainObj = $("#" + this.divId + " .list .extendMain").get(0);
	this.beginObj = $("#" + this.divId + " .list .extendBegin").get(0);
	this.endObj = $("#" + this.divId + " .list .extendEnd").get(0);
}

//绑定时间
ScrollLeftRight.prototype.BindEvt = function(){
	var theObj = this;
	theObj.timmer = setInterval(function(){
		theObj.Marquee();
	}, theObj.speed);
	
	$(this.mainObj).hover(function(){
		if (theObj.timmer != null) {
			clearInterval(theObj.timmer);
		}
	}, function(){
		theObj.timmer = setInterval(function(){
			theObj.Marquee();
		}, theObj.speed);
	});
}

//滚动
ScrollLeftRight.prototype.Marquee = function(){
	if (this.theType == "right") {
		if (this.mainObj.scrollLeft <= 0) {
			this.mainObj.scrollLeft += this.endObj.offsetWidth;
		}
		else {
			this.mainObj.scrollLeft--;
		}
	}
	else {
		if (this.endObj.offsetWidth - this.mainObj.scrollLeft <= 0) {
			this.mainObj.scrollLeft -= this.beginObj.offsetWidth;
		}
		else {
			this.mainObj.scrollLeft++;
		}
	}
}