/*

 添加cookie

 参数：cookie名，cookie值，过期时间

 贾锡安

 2013-9-15 7:49:16

 */

 function addCookie(name, value, hours) {

     var str = name + "=" + escape(value);

     //为时不设定过期时间，浏览器关闭时cookie自动消失

     if (hours > 0) {

         var date = new Date();

         date.setTime(date.getTime() + days * 60 * 60 * 1000);

         str += ";expires=" + exp.toGMTString();

     }

     document.cookie = str;

 }

 /*

 设置cookie

 参数：cookie名，cookie值

 贾锡安

 2013-9-15 7:49:16

 */

 function setCookie(name, value) {

     var days = 30;          //此 cookie 将被保存 30 天

     var exp = new Date();   //new Date("December 31, 9998");

     exp.setTime(exp.getTime() + days * 24 * 60 * 60 * 1000);

     document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString();

 }

 /*

 获取cookie

 参数：cookie名

 贾锡安

 2013-9-15 7:49:16

 */

 function getCookie(name) {

     var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));

     if (arr != null) {

         return unescape(arr[2]);

     }

     else {

         return null;

     }

 }

 /*

 删除cookie

 参数：cookie名

 贾锡安

 2013-9-15 7:49:16

 */

 function delCookie(name) {

     document.cookie = name + "=" + escape(value) + ";expires=" + (new Date(0)).toGMTString();

 }

 /*

 获取cookie

 参数：cookie名

 贾锡安

 2013-9-15 7:49:16

 */

 function cookie(name) {

     var cookieArrary = document.cookie.split(';');

     for (var i = 0; i < cookieArrary.length; i++) {

         var arr = cookieArrary[i].split('=');

         if (arr[0] = name) {

             return unescape(arr[1]);

         }

     }

     return null;

 }