jquery提交表单常用写法!

$('.newsletterForm').on('submit', function(evt){
evt.preventDefault();
var action = $(this).attr('action');
var $container = $(this).closest('.formContainer');
$.ajax({
url: action,
type: 'POST',
success: function(data){
if(data.success){
$container.html('<h2>Thank you!</h2>');
} else {
$container.html('There was a problem.');
}
},
error: function(){
$container.html('There was a problem.');
}
});
});