function __buildXMLdom(sXML)
{

	if (window.ActiveXObject)
	{
	
		var xmldom;
		xmldom=new ActiveXObject("Microsoft.XMLDOM");
		xmldom.loadXML("<?xml version='1.0' ?><root>" + sXML + "</root>");

		return xmldom;
	}
	else
	{
		parser=new DOMParser();
		xmlDoc=parser.parseFromString("<?xml version='1.0' ?><root>" + sXML + "</root>","text/xml");
		return xmlDoc;  	
    }
}


function __shoppingcart()
{
	this.goods="";
	this.lastScrollY=0;


}

__shoppingcart.prototype.getcart=function()
{
	//购物车内容

	if (getCookie("shoppingcart_CN"))
	{
		return getCookie("shoppingcart_CN");
	}
	else
	{
		return "";
	}
}

function getText(oNode) {

    var sText = "";

    for (var i = 0; i < oNode.childNodes.length; i++) {

       if (oNode.childNodes[i].hasChildNodes()) {

           sText += getText(oNode.childNodes[i]);

       } else {

           sText += oNode.childNodes[i].nodeValue;

       }

    }
    return sText;

}


__shoppingcart.prototype.addtocart=function(option,__callback)
{
	var option2xml,cartxml;
	if(!option.quantity)
		option.quantity=1;
	if(!option.description)
		option.description=" ";

	cartxml=this.getcart();
	if (cartxml)
	{
		var root=__buildXMLdom(cartxml);
		try
		{
			var elems=root.documentElement.getElementsByTagName("record");
		}
		catch (e)
		{
			this.removeallfromcart();
			return;
		}
		
		
		var i;
		for (i=0; i<elems.length; i++)
		{
			//alert("比较：\ny"+elems[i].getElementsByTagName("productid")[0].firstChild.data+"+\ny"+option.productid+"+");
			if(elems[i].getElementsByTagName("productid")[0].firstChild.data.toString()==option.productid.toString() && elems[i].getElementsByTagName("description")[0].firstChild.data.toString()==option.description.toString())
			{
				elems[i].getElementsByTagName("quantity")[0].firstChild.data=parseInt(elems[i].getElementsByTagName("quantity")[0].firstChild.data)+parseInt(option.quantity);
				
				//alert("相同\n"+root.documentElement.xml);
				if (window.ActiveXObject)
				{
					setCookie("shoppingcart_CN",root.documentElement.xml.replace("<root>","").replace("</root>",""));
				}
				else
				{
					var oSerializer = new XMLSerializer();
					setCookie("shoppingcart_CN",oSerializer.serializeToString(root.documentElement).replace("<root>","").replace("</root>",""));
				}

				if (__callback)
				{
					__callback();
				}
				return;
			}
		}
		option2xml="<record><productid>"+option.productid+"</productid>"+"<quantity>"+option.quantity+"</quantity>"+"<description><![CDATA["+option.description+"]]></description></record>"
		setCookie("shoppingcart_CN",cartxml+option2xml);
	}
	else
	{
		option2xml="<record><productid>"+option.productid+"</productid>"+"<quantity>"+option.quantity+"</quantity>"+"<description><![CDATA["+option.description+"]]></description></record>"
		setCookie("shoppingcart_CN",cartxml+option2xml);
	}
	
	if (__callback)
	{
		__callback();
	}
	
	//alert(getCookie("shoppingcart"));
}

__shoppingcart.prototype.updatecart=function(option,__callback)
{
	var option2xml,cartxml;
	if(!option.quantity)
		option.quantity=1;
	if(!option.description)
		option.description=" ";
	option.description=unescape(option.description);
	cartxml=this.getcart();
	if (cartxml)
	{
		var root=__buildXMLdom(cartxml);
		var elems=root.documentElement.getElementsByTagName("record");
		
		var i;
		for (i=0; i<elems.length; i++)
		{
				
			//alert("比较：\ny"+elems[i].getElementsByTagName("productid")[0].firstChild.data+"+\ny"+option.productid+"+");
			if(elems[i].getElementsByTagName("productid")[0].firstChild.data.toString()==option.productid.toString() && elems[i].getElementsByTagName("description")[0].firstChild.data.toString()==option.description.toString())
			{
				elems[i].getElementsByTagName("quantity")[0].firstChild.data=parseInt(option.quantity);
				
				//alert("相同\n"+root.documentElement.xml);
				if (window.ActiveXObject)
				{
					setCookie("shoppingcart_CN",root.documentElement.xml.replace("<root>","").replace("</root>",""));
				}
				else
				{
					var oSerializer = new XMLSerializer();
					setCookie("shoppingcart_CN",oSerializer.serializeToString(root.documentElement).replace("<root>","").replace("</root>",""));
				}

				if (__callback)
				{
					__callback();
				}
				return;
			}
		}
	}
	

	//alert(getCookie("shoppingcart"));
}

__shoppingcart.prototype.removefromcart=function(option,__callback)
{

	var option2xml,cartxml;
	cartxml=this.getcart();

	if (cartxml)
	{
		var root=__buildXMLdom(cartxml);
		var elems=root.documentElement.getElementsByTagName("record");

		var i,j;
		option.productid=option.productid.split(",");
		option.description=unescape(option.description);

		//alert(elems.length+"\n"+option.description.length);
		for (j=0; j<option.productid.length; j++)
		{
			for (i=0; i<elems.length; i++)
			{
				//alert(j)
				//alert(j+"\ndescription:"+option.description[1].toString()+"\n"+elems[i].getElementsByTagName("description")[0].firstChild.data);
				if(elems[i].getElementsByTagName("productid")[0].firstChild.data.toString()==option.productid[j].toString() && elems[i].getElementsByTagName("description")[0].firstChild.data.toString()==option.description.toString())
				{
					root.documentElement.removeChild(elems[i]);
					
					//alert("相同\n"+root.documentElement.xml);
					if (window.ActiveXObject)
					{
						setCookie("shoppingcart_CN",root.documentElement.xml.replace("<root>","").replace("</root>",""));
					}
					else
					{
						var oSerializer = new XMLSerializer();
						setCookie("shoppingcart_CN",oSerializer.serializeToString(root.documentElement).replace("<root>","").replace("</root>",""));
					}
				}
			}
		}
		if (__callback)
		{
			__callback();
		}
	}
}

__shoppingcart.prototype.removeallfromcart=function(__callback)
{
	setCookie("shoppingcart_CN","");
	if (__callback)
	{
		__callback();
	}
}

/*货运信息*/
__shoppingcart.prototype.issetShippinginfo=function()
{
	var cartxml;
	var d,shippinginfo,newelem;
	cartxml=this.getcart();
	if (cartxml)
	{
		var root=__buildXMLdom(cartxml).documentElement;
		if(root.getElementsByTagName("shippinginfo")[0])
		{
			root=null;
			return true;
		}
		root=null;
	}
	return false;
}

__shoppingcart.prototype.loadShippinginfo=function()
{
	var cartxml,root,shippinginfo,elems_v;
	cartxml=this.getcart();

	if (cartxml)
	{

		var root=__buildXMLdom(cartxml).documentElement;
		
		var baseName;
		
		shippinginfo=root.getElementsByTagName("shippinginfo")[0];
		
		if(shippinginfo)
		{
			var elems=shippinginfo.childNodes;

			for (i=0; i<elems.length; i++)
			{
				try
				{
					baseName=elems[i].baseName?elems[i].baseName:elems[i].localName;
					//alert("$shoppingcart."+baseName+"=\""+elems[i].firstChild.data+"\"");
					window.eval("$shoppingcart."+baseName+"=\""+elems[i].firstChild.data+"\"");
					//alert("ok");
				}catch(e)
				{}
			}
		}
		root=null;
		
	}
}

__shoppingcart.prototype.setShipping=function(option,__callback)
{

	var option2xml,cartxml,i;
	var d,shippinginfo,newelem;
	cartxml=this.getcart();

	if (cartxml)
	{
		
		var root=__buildXMLdom(cartxml).documentElement;
		
		shippinginfo=root.getElementsByTagName("shippinginfo")[0];

		if (!shippinginfo)
		{

			var _v;
			shippinginfo=root.ownerDocument.createElement("shippinginfo");
			
			for(var p in option){

				newelem=root.ownerDocument.createElement(p);
				newelem.appendChild(root.ownerDocument.createCDATASection(eval("option."+p)));
				shippinginfo.appendChild(newelem);
			}
			root.appendChild(shippinginfo);
		}
		else
		{

			for(var p in option)
			{
				try
				{
				shippinginfo.getElementsByTagName(p)[0].firstChild.data=eval("option."+p);
				}catch(e){}
			}

		}

		/*
		var __xml="";
		for(var p in option){      
			__xml+="<"+p+"><![CDATA["+eval("option."+p)+"]]></"+p+">" 
		}
		*/

		//alert(root.xml.replace("<root>","").replace("</root>",""));
		
		if (window.ActiveXObject)
		{
			setCookie("shoppingcart_CN",root.xml.replace("<root>","").replace("</root>",""));
		}
		else
		{
			var oSerializer = new XMLSerializer();
			setCookie("shoppingcart_CN",oSerializer.serializeToString(root).replace("<root>","").replace("</root>",""));
		}
		
	}
	else
	{
	
	}
}
//显示右侧购物车
__shoppingcart.prototype.showshoppingcart=function(option)
{
	return;
	var elem=gE("frmshowshoppingcart");
	if (!elem)
	{
		elem=document.createElement("iframe");
		elem.id="frmshowshoppingcart";
		elem.frameBorder=0;
		elem.scrollbar=false;
		document.body.appendChild(elem);
		elem.contentWindow.location="/shoppingcart/frmshoppingcart.asp";
		window.onscroll=function(){
			gE("frmshowshoppingcart").style.posTop=document.documentElement.height-gE("frmshowshoppingcart").clientHeight ;
		}
	}
}

__shoppingcart.prototype.update=function(option)
{
	var elem=gE("frmshowshoppingcart");
	if (elem)
	{
		elem.contentWindow.location="/shoppingcart/frmshoppingcart.asp";
	}
	else
	{
		this.showshoppingcart();
	}
}

__shoppingcart.prototype.hideshoppingcart=function(option)
{
	var elem=gE("frmshowshoppingcart");
	if (elem)
	{
		elem.removeNode();
	}
}

var $shoppingcart=new __shoppingcart();
//alert($shoppingcart.getcart());