JavaScript操作cookie

以下操作cookie在Firefox和Safari中测试成功，在IE中失败（读取、获取，改写，设置）。

经过反复测试，发现把http://127.0.0.1改为http://localhost之后，IE中也可以正常运行。

function getCookie(c_name) {

         if (document.cookie.length > 0) {

             c_start = document.cookie.indexOf(c_name + "=");

             if (c_start != -1) {

                 c_start = c_start + c_name.length + 1;

                 c_end = document.cookie.indexOf(";", c_start);

                 if (c_end == -1) c_end = document.cookie.length;

                 return (document.cookie.substring(c_start, c_end));

             }

         }

         return ""

     }

     function setCookie(c_name, value, expiredays) {

         var exdate = new Date();

         exdate.setDate(exdate.getDate() + expiredays);

         document.cookie = c_name + "=" + value + ((expiredays == null) ? "" : ";expires=" + exdate.toGMTString()) + ";path=/";

         ;

     function checkCookie() {

         master_headertop_narrow_show = getCookie('master_headertop_narrow_show')

         alert(master_headertop_narrow_show); //////

         if (master_headertop_narrow_show != null && master_headertop_narrow_show != "") {

             if (master_headertop_narrow_show == 'true') {

                 var master_headertop = document.getElementById('master_headertop');

                 if (master_headertop)

                     master_headertop.style.display = 'none';

                 var master_headertop_narrow = document.getElementById('master_headertop_narrow');

                 if (master_headertop_narrow)

                     master_headertop_narrow.style.display = 'block';