function writeCookie(name, ID, pro, num, pri)
{
  var test=false;
  var values="," + escape(ID) + "#" + escape(pro) + "#" + escape(num) + "#" + escape(pri);
  var cookieValue = readCookie(name);
		sss=cookieValue.split(",")
		for (i=0;i<sss.length;i++){
		s=sss[i].split("#");
			for(j=0;j<s.length;j++){
				if(s[0]==ID)
				{
					cookieValue=cookieValue.replace(","+sss[i],"");
					nums=s[2];
					test=true;
					alert('This product was in your cart. The Quantity is added one more.');
					break;
				}
			}
		}
	if (test)
	{
		document.cookie = name + "=" + cookieValue+ "," + escape(ID) + "#" + escape(pro) + "#" + escape(parseInt(num)+parseInt(nums)) + "#" + escape(pri);
		test=false;
	}
	else
	{
		document.cookie = name + "=" + cookieValue+values;
		alert ('Thank you for your selection.');
	}
	
}


//name购物车名称
function readCookie(name)
{
  var cookieValue = "";
  var search = name + "=";
  if(document.cookie.length > 0)
  { 
    offset = document.cookie.indexOf(search);
    if (offset != -1)
    { 
      offset += search.length;
      end = document.cookie.indexOf(";", offset);
      if (end == -1) end = document.cookie.length;
      cookieValue = document.cookie.substring(offset, end)
    }
  }
  return cookieValue;
}//readCookie(name)   此函数为返回已购买的所有内容,包括  物品ID,物品单价,物品名称,物品数量

function stringToInteger (inputString)
{
  return parseInt(inputString);
}//stringToInteger(inputString)   返回由字符串(inputString)转换所得到的整数

function isNotaNumber (inputString)
{
  return isNaN(inputString);
}//isNotaNumber(inputString)   返回一个 Boolean 值，指明inputString是否是保留值NaN(不是数字)

function UpdateCookie(name,Ids)
{
  var buy_num=document.getElementById(Ids);
  value=buy_num.value;
  s=value.split("#");
  value=escape(s[0])+"#"+escape(s[1])+"#"+escape(s[2])+"#"+escape(s[3])
  var vvv="";
  vvv=readCookie(name);//返回所有购买的内容
  vvv=vvv.replace(','+value,"");//把要删除的内容和其前面的","一起置空
  document.cookie = name + "=" + vvv;//再把新的内容写入cookie里面
}//UpdateCookie(name, value)   删除value这个内容

function ModifyCookie(name, valuex, ID, pro, num, pri)
{
  var vvv="";
  vvv=readCookie(name);//返回购买的所有内容,包括  物品ID,物品名称,物品数量,物品单价
  s=valuex.split("#");
  valuex=escape(s[0])+"#"+escape(s[1])+"#"+escape(s[2])+"#"+escape(s[3])
  vvv=vvv.replace(','+valuex,"");//把要修改的内容去掉
  document.cookie = name + "=" + vvv + "," + escape(ID) + "#" + escape(pro) + "#" + escape(num) + "#" + escape(pri);//加上修改后得到的内容
  //location.reload();
  location.href='?';
}//ModifyCookie(name, valuex, ID, pro, num, pri)   修改内容,valuex为修改前的内容,value1-value4为修改后的内容

function clears()
{
	if (confirm("Are you sure you wish to proceed?"))
	{
	document.cookie="GTL_ShoppingCart"+"=";
	window.location.href='ShoppingCart.asp';
	}
}//清除COOKIE

function clears_D()
{
	document.cookie="GTL_ShoppingCart=";

}//清除COOKIE

function AllPrice(num)
{
	var All=document.getElementById("Total");
	All.innerHTML=num;
	
}//显示价格