[рони]

Judgin,

var my_form = document.querySelector('[name="myForm"]');

            if(!my_form){
            my_form=document.createElement('FORM');
            my_form.name='myForm';
            my_form.method='POST';
            my_form.action='insert_data_to_db.php';
            document.body.appendChild(my_form);
            };