//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;

}