$(document).ready(function(){
        $('#targets').submit(function() {
            var error = 0;
            var name = $('#name').val();

            var regex_length = /^[A-Za-z0-9]{3,6}$/;

            if(!regex_length.test(name)){
                error = 1;
                alert("Name should be between 3-6 characters");
            }

            if(error){
                return false;
            }else{
                return true;
            }

        });
});