Angular JS输入验证

<form name="mgForm" ng-app="myApp" ng-controller="validateCtrl" novalidate>
<p>用户名:<input type="text" name="user" ng-model="user" required><span style="color:red" ng-show="myForm.user.$dirty && myForm.user.$invalid"><span ng-show="myForm.user.$error.required">用户名是必须的</span></span></p>
<p>邮箱：<input type="email"  name="email" ng-model="email" required><span style="color:red;" ng-show="mgForm.email.$dirty && mgForm.email.$invalid"><span ng-show=myForm.email.$error.required>邮箱是必须的</span><span ng-show="myForm.email.$error.email">非法邮箱</span></p>
<input type="submit" ng-disabled=“myForm.user.&dirty&&myForm.user.$invalid || myForm.email.$dirty && myForm.email.$invalid”>
</form>
<script>
var app=angular.module("myApp",[]);
app.controller("validateCtrl",function($scope)
{
  $scope.user="John Doe";
  $scope.eamil="John.doe@gmail.com";

});
</script>