$('.back').click(function(e){
$("form").children('input[type="submit"]').click();
$('form').trigger('submit');
$('form').onsubmit();
$('form').on("submit", function(){
});
})
$(document)
.on('click', '.back', function (e) {
$('form').trigger('submit');
})
.on('submit', 'form', function (e) {
};