function add_history(product_id,product_name,product_price)
{
	var productName="";
	var productPrice="";
	var productIdsArray=null;
	var productNameArray=null;
	var productPriceArray=null;
	var productIds=getCookie("productids");
	if(productIds!=null)
	{
		productName=getCookie("productname");
		productNameArray=productName.split("|");
		productPrice=getCookie("productprice");
		productPriceArray=productPrice.split("|");
		productIdsArray = productIds.split("|");
		if (valueInArray(product_id,productIdsArray)==-1)
		{
			var end=4;
			if (productIdsArray.length<5)
			{
			  end=productIdsArray.length;
			}
			productName=product_name;
			productPrice=product_price;
			productIds=product_id;
			for (var i=0;i<end ;i++ )
			{
			  productName=productName+"|"+productNameArray[i];
				productPrice=productPrice+"|"+productPriceArray[i];
				productIds=productIds+"|"+productIdsArray[i];
			}
		}
	}else
	{
		productName=product_name;
		productPrice=product_price;
		productIds=product_id;
	}
	SetCookie("productname",productName);
	SetCookie("productprice",productPrice);
	SetCookie("productids",productIds);
	show_history();
}

function del_history()
{
  SetCookie("productname","");
	SetCookie("productprice","");
	SetCookie("productids","");
	show_history();
}

function show_history()
{
	var productIds=getCookie("productids");
	var productTxt="";
	if (productIds!=null)
	{
		var productName=getCookie("productname");
		var productPrice=getCookie("productprice");
		var productIdsArray=productIds.split("|");
		var productNameArray=productName.split("|");
		var productPriceArray=productPrice.split("|");
		for (var i=0;i<productIdsArray.length ;i++ )
		{
			productTxt+="<li><a href=\"product.php?arg="+arg+"&pid="+productIdsArray[i]+"\" style=\"text-decoration:none;color:#47577B\"> "+productNameArray[i]+"</a></li>";
		}
		
	}
	_getId("history_list").innerHTML=productTxt;
}

function to_buy(pid,pnum)
{
	location.href="product_buy.php?arg="+arg+"&product_id="+pid+"&product_num="+pnum;
}