前台部分代码：

<div id='error'></div><!--错误提示信息-->    <input type='text' id='username' name='username' readonly='Readonly'/><!--readonly为只读-->    <input type='password' id='password' name='password'>  <input type='text' id='company' name='company'>  <input type='text' id='mobile' name='mobile'>  <input type='text' id='email' name='email'>  <button type='button' onclick='edit();'></button>    <script>      function edit(){          var password = $('#password').val();          var company = $('#company').val();            if(password == ''){               $('error').show();               $('error').html("密码不能为空!");               return.false;          }          else if(company == ''){               $('error').show();               $('error').html("公司名称不能为空!");               return.false;          }else if(mobile.length<11){               $('error').show();               $('error').html("手机号码不正确!");               return.false;          }else if(email){              var myreg = /^([a-zA-Z0-9]+[_|\_|\.]?)*[a-zA-Z0-9]+@([a-zA-Z0-9]+[_|\_|\.]?)*[a-zA-Z0-9]+\.[a-zA-Z]{2,4}$/;              if(!myreg.test(email)){                  $('#error').show();                  $('#error').html("Email格式不正确！");                  return false;          }          else{              $('#error').hide();          }          get_url = "{:U('Index/settingsave')}";          $.ajax({              url:get_url,              type:'POST',              data:{'password':password,'company':company,'mobile':mobile,'email':email},              cache:false,              dataType:"json",              success:function(data){                  if(data.status == "success"){                      $('#error').show();                      $('#error').html(data.Msg);                  }else{                      $('#error').show();                      $('#error').html(data.Msg);                  }              }          });          return false;      }  </script>

后台部分代码：

<?php      public function settingsave(){            $user=M("user");          $id=session("userid");          $password=I("post.password");          $data['Company']=I("post.company");          $data['Mobile']=I("post.mobile");          $data['Email']=I("post.email");              if($password!=''){              $data['Password']=md5($password);          }          $condition['Id']=$id;          $result = $user->where($condition)->save($data);            if($result !== false) {              echo  '{"status":"success","Msg":"修改成功"}';                die();          }else{              echo  '{"status":"false","Msg":"修改失败"}';                die();            }      }  ?>