function clickLogin(){          var userName = $("#user").val().trim();          // console.log(userName);          // $.cookie("userNmae",userName,{expires: 300});          save_html5_storage("userNmae",userName);}// 检测是否支持本地存储      function supports_html5_storage() {          try {              return 'localStorage' in window && window['localStorage'] !== null;          } catch (e) {              return false;          }      }      //本地存储保存信息代码      function save_html5_storage(key,value) {          if(supports_html5_storage()){              localStorage[key] = value;          }      }      //读取本地存储信息代码      function read_html5_storage(key) {          if(supports_html5_storage()){              return localStorage[key];          }      }      window.onload = function(){                       $("#user").val(read_html5_storage("userNmae"));      }