I have the following script, which validate my fields before submitting...validation works, but when the fields are filled...form does not get submitted. I get no error messages in the console, so I guess that from some reason, prevent_default prevents the form to be submitted, even that all fields are filled.

Here is the code:

 (function () {
 // list all variables used here...
 var 
 conForm = jQuery('#conForm'),
 fullname = jQuery('#fullname'),
 customeremail = jQuery('#customeremail'),
 phone = jQuery('#phone'),
 comments = jQuery('#comments');
 // funcktion for checking the e-mail address entered by the user
 function validateEmail(sEmail) {
 var filter = /^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/;
 if (filter.test(sEmail)) {
 return true;
 } else {
 return false;
 }
 }
 // on exit, check if the user lef the first name emty 
 fullname.on('blur', function(e){
 var tempval = document.getElementById('fullname').value;
 if(fullname.val()==''){
 //jQuery("#p_username").focus();
 jQuery('#fullname').addClass('bordered2'); 
 jQuery('#fullname').removeClass('good_input'); 
 jQuery("#fullname").attr("placeholder", "Εισάγετε το όνομα σας").placeholder();
 e.preventDefault();
 } else {
 jQuery('#fullname').removeClass('bordered2'); 
 }
 });
 // check if the email entered is valid email address when exit the field
 customeremail.on('blur',function(e) {
 var sEmail = jQuery('#customeremail').val();
 if (jQuery.trim(sEmail).length == 0) {
 // if user leave the field empty
 //jQuery("#customeremail").focus();
 jQuery('#customeremail').removeClass('good_input'); 
 jQuery('#customeremail').addClass('bordered2'); 
 jQuery("#customeremail").attr("placeholder", "Εισάγετε το email σας").placeholder();
 e.preventDefault();
 }
 if (validateEmail(sEmail)) {
 // if the e-mail is valid
 jQuery('#customeremail').removeClass('bordered2'); 
 jQuery('#customeremail').addClass('good_input'); 
 } else {
 // if the e-mail is NOT valid
 //jQuery("#customeremail").focus();
 jQuery('#customeremail').removeClass('good_input'); 
 jQuery('#customeremail').addClass('bordered2'); 
 sEmail = "";
 jQuery("#customeremail").val(sEmail);
 jQuery("#customeremail").attr("placeholder", "Εισάγετε υπαρκτό email").placeholder();
 e.preventDefault();
 }
 });
 // on exit, check if the user lef the phone emty 
 phone.on('blur', function(e){
 var tempval = document.getElementById('phone').value;
 if(phone.val()==''){
 //jQuery("#p_username").focus();
 jQuery('#phone').addClass('bordered2'); 
 jQuery('#phone').removeClass('good_input'); 
 jQuery("#phone").attr("placeholder", "Εισάγετε το τηλέφωνο σας").placeholder();
 e.preventDefault();
 } if (tempval.length != 10) {
 //jQuery("#p_username").focus();
 jQuery('#phone').addClass('bordered2'); 
 jQuery('#phone').removeClass('good_input'); 
 tempval = "";
 jQuery("#phone").val(tempval);
 jQuery("#phone").attr("placeholder", "Εισάγετε 10 αριθμούς χωρίς κενά").placeholder();
 e.preventDefault();
 } if(!jQuery.isNumeric(tempval)) {
 jQuery('#phone').addClass('bordered2'); 
 jQuery('#phone').removeClass('good_input');
 tempval = "";
 jQuery("#phone").val(tempval);
 jQuery("#phone").attr("placeholder", "Εισάγετε μόνο αριθμούς").placeholder();
 }
 if (tempval.length == 10) {
 jQuery('#phone').removeClass('bordered2'); 
 jQuery('#phone').addClass('good_input'); 
 } 
 });
 // user fill all fields as it should, so form can be submitted
 conForm.submit(function(e){ 
 e.preventDefault(); 
 // prevent user from hitting submit button with empty form.
 var tempval = document.getElementById('fullname').value;
 if(tempval.length ==0){
 //jQuery('#p_username').focus();
 jQuery('#fullname').addClass('bordered2'); 
 jQuery('#fullname').removeClass('good_input'); 
 jQuery("#fullname").attr("placeholder", "Εισάγετε το όνομα σας").placeholder();
 e.preventDefault();
 }
 var sEmail = jQuery('#customeremail').val();
 if (jQuery.trim(sEmail).length == 0) {
 // if user leave the field empty 
 jQuery('#customeremail').removeClass('good_input'); 
 jQuery('#customeremail').addClass('bordered2'); 
 jQuery("#customeremail").attr("placeholder", "Εισάγετε το email σας").placeholder();
 e.preventDefault();
 }
 if (validateEmail(sEmail)) {
 // if the e-mail is valid
 jQuery('#customeremail').removeClass('bordered2'); 
 jQuery('#customeremail').addClass('good_input'); 
 } else {
 // if the e-mail is NOT valid
 jQuery('#customeremail').removeClass('good_input'); 
 jQuery('#customeremail').addClass('bordered2'); 
 sEmail = "";
 jQuery("#customeremail").val(sEmail);
 jQuery("#customeremail").attr("placeholder", "Εισάγετε υπαρκτό email").placeholder();
 e.preventDefault();
 }
 var tempval = document.getElementById('phone').value;
 if(tempval.length ==0){
 //jQuery('#p_username').focus();
 jQuery('#phone').addClass('bordered2'); 
 jQuery('#phone').removeClass('good_input'); 
 jQuery("#phone").attr("placeholder", "Εισάγετε το τηλέφωνο σας").placeholder();
 e.preventDefault();
 }
 //return false; 
 })
}) ();

Can anyone help me to find out what is wrong with this script?

Regards, John