js简单操作Cookie

　　贴一段js简单操作Cookie的代码：

 //获取指定名称的cookie的值
 function getCookie(objName) {
     var arrStr = document.cookie.split("; ");
     for (var i = 0; i < arrStr.length; i++) {
         var temp = arrStr[i].split("=");
         if (temp[0] == objName) return unescape(temp[1]);
     }
 }
 //添加cookie
 function addCookie(objName, objValue, objHours) {
     var str = objName + "=" + escape(objValue);
     if (objHours > 0) {                               //为时不设定过期时间，浏览器关闭时cookie自动消失
         var date = new Date();
         var ms = objHours * 3600 * 1000;
         date.setTime(date.getTime() + ms);
         str += "; expires=" + date.toGMTString();
     }
     document.cookie = str;
 }
 //删除cookie
 function delCookie(name)
 {
     document.cookie = name + "=;expires=" + (new Date(0)).toGMTString();
 }