(JS实现顾客商品浏览记录以及购物车)Cookie的保存与删除

//JS实现顾客浏览商品的记录以及实现购物车的功能
function setCookie(name,value)
{
  var Days = 30;
  var exp  = new Date();
  exp.setTime(exp.getTime() + Days*24*60*60*1000);
  //在最后追加  ;path=/ 非常有必要。否则容易出现   在不同的目录下，调用同一个js方法来存储Cookie，到别的目录取不出或取出的值是不对的这种情况
  document.cookie = name + "="+ escape(value) +";expires="+ exp.toGMTString()+";path=/";   //name=value;时间
}

function getCookie(name)
{
  var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));   // name= ;
  if(arr != null){
      alert("我是getCookie()方法："+unescape(arr[2]));
      return unescape(arr[2]);
  }
  return null;
}

function delCookie(name)
{
  var exp = new Date();
  exp.setTime(exp.getTime() - 1);
  var cval=getCookie(name);
  if(cval!=null) document.cookie=name +"="+cval+";expires="+exp.toGMTString();
}
/**
 * 加入购物车，存入cookie
 */
function goBuy(id, price)
{
    var basePath = document.getElementById("basePath").getAttribute("value");
    var newCookie = "";
    var oldCookie = getCookie("product");
    if(oldCookie) {
        //如果已经存在在cookie中，则不再添加
        if(inArray(oldCookie.split(","), id)) {
            newCookie = oldCookie;
        } else {
            newCookie = id + "," + oldCookie;
        }
    } else {
        newCookie = id;
    }
    setCookie("product", newCookie);
    location.href = basePath+"servlet/CookieServlet?param=car&pid="+id;
}
/**
 * 浏览记录，存入cookie
 */
function goView(id){
    var basePath = document.getElementById("basePath").getAttribute("value");
    var newCookie = "";
    var oldCookie = getCookie("listView");
    if(oldCookie) {
        if(inArray(oldCookie.split(","), id)) {
            newCookie = oldCookie;
        } else {
            newCookie = id + "," + oldCookie;
        }
    } else {
        newCookie = id;
    }
    setCookie("listView", newCookie);
    location.href = basePath+"servlet/CookieServlet?param=listView&pid="+id;
}