------------产品详细页面代码---------

<script language="javascript" type="text/javascript"> 
//cookie的相关函数
function getCookieVal(offset) {
    var endstr = document.cookie.indexOf(";", offset);
    if (endstr == -1) endstr = document.cookie.length;
    return unescape(document.cookie.substring(offset, endstr));
}

function getCookie(name) {
    var arg = name + "=";
    var alen = arg.length;
    var clen = document.cookie.length;
    var i = 0;
    while (i < clen) {
        var j = i + alen;
        if (document.cookie.substring(i, j) == arg) return getCookieVal(j);
        i = document.cookie.indexOf(" ", i) + 1;
        if (i == 0) break;
    }
    return null;
}
function setCookie(name, value) {
    var exp = new Date();
    exp.setTime(exp.getTime() + 3600000000);
    document.cookie = name + "=" + value + "; expires=" + exp.toGMTString();
}

$(function () {
    var pro_url = document.URL; //页面地址 
    var pro_name = $(".show_right h1").text(); //产品名称 
    var pro_img = $("#zoom1 img")[0].src; //图片路径 
    var pro_online = $(".proinquire").attr("href"); //询盘路径
    wlink = pro_url + "+" + pro_name + "+" + pro_img + "+" + pro_online +"|";
    old_info = getCookie("history_info");
    var insert = true;
    ////////////////////////

    if (old_info == null)          //判断cookie是否为空
    {
        insert = true;
    }
    else {
        var old_link = old_info.split("|");
        for (var j = 0; j <= 5; j++) {
            if (old_link[j].indexOf(pro_url) != -1) 
          打开页面这里报错  'undefined' 为空或不是对象

                insert = false;
        }
    }

    /////////////////////////////
    if (insert)                //如果符合条件则重新写入数据
    {
        wlink += getCookie("history_info");
        setCookie("history_info", wlink);
        history_show().reload();
    }

})
</script>

-------------其他页面显示代码---------------

<script>
    //cookie的相关函数
    function getCookieVal(offset) {
        var endstr = document.cookie.indexOf(";", offset);
        if (endstr == -1) endstr = document.cookie.length;
        return unescape(document.cookie.substring(offset, endstr));
    }
    function getCookie(name) {
        var arg = name + "=";
        var alen = arg.length;
        var clen = document.cookie.length;
        var i = 0;
        while (i < clen) {
            var j = i + alen;
            if (document.cookie.substring(i, j) == arg) return getCookieVal(j);
            i = document.cookie.indexOf(" ", i) + 1;
            if (i == 0) break;
        }
        return null;
    }
function history_show()
{   
 var history_info=getCookie("history_info");
 var content=""; 
 if(history_info!=null)
 {
 history_arg=history_info.split("|");
 var i;
 for(i=0;i<=5;i++)
 {
  if(history_arg[i]!="null")
  {
      var wlink = history_arg[i].split("+"); 
此处报错.'history_arg[...]' 为空或不是对象

      content = "最近浏览记录"; 
//    content+=(wlink[0]);
    content += ("<li><em><a href='" + wlink[0] + "'><img src='" + wlink[2] + "' width='50' height='39'></a></em>");
    content += ("<div><strong><a href='" + wlink[0] + "'>" + wlink[1] + "</a></strong><span>[<a href='" + wlink[3] + "'>在线询盘</a>]</span></div>")
   }
   document.getElementById("history").innerHTML=content;
   }
}
else
 {document.getElementById("history").innerHTML="对不起，您没有任何浏览纪录";}
}
</script>