<script>


        window.onload =function(){

            //s 代表秒  h代表小時  d代表天
            var demo = '{"product":[' + '{"proId":' + 123 + ',"proPrice":' + 100 + ',"proNum":' + 10 + '}' + '],"totalPrice":' + 100 + '}';

            var demo1 = '{"product":[{"proId":123,"proPrice":100,"proNum":10}],"totalPrice":100}'
 
;

            console.log(demo+"xx");

            setCookie("name",demo,"s100");
            var value = getCookie("name");
            console.log('獲取cookie的值為'+value);
            var cooieJson = JSON.parse(value);
            console.log(cooieJson.product[0].proId+"]]"+cooieJson.product[0].proPrice);
        }

        //判斷是否為最後一個來決定是否要加最後的逗號  ② 講id 的值前邊拼接上 "{"  最後欄位的值後邊拼接上 } "
 

        '{"product":[{"proId":"123","proPrice":"100"},{},{}]}'
        '{"product":[' + "{proId:" + 123 + ",proPrice:" + 100 + ",proNum" + 10 + "}" + '],totalPrice:' + 100 + '}';


        //cookie 封裝 獲取 cookie 
        function getCookie(name) { 
        var arr,reg=new RegExp("(^| )"+name+"=([^;]*)(;|$)");
        if
 
(arr=document.cookie.match(reg))
        return unescape(arr[2]); 
        else 
        return null; 
        } 

        //刪除cookie
        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(); 
        } 


        //設定cookie 以及過期時間

        function setCookie(name,value,time)
        { 
            var strsec = getsec(time); 
            console.log("過期時間為--->"+strsec);
            var exp = new Date(); 
            exp.setTime(exp.getTime() + strsec*1); 
            document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString(); 
            } 


        //獲取設定過期時間
        function getsec(str)
        { 
           alert(str); 
           var str1=str.substring(1,str.length)*1; 
           var str2=str.substring(0,1); 
           if (str2=="s")
           { 
                return str1*1000; 
           }
           else if (str2=="h")
           { 
               return str1*60*60*1000; 
           }
           else if (str2=="d")
           { 
               return str1*24*60*60*1000; 
           } 
        } 

    </script>