javascript combine two with IF - if-statement

Question

I am trying to combine two javascripts to one using IF.
I want IF script1 is True to run only script1.
And IF script1 is False to run script2.
Script1= Check all field with "required" if empty in a contact form.
Script2= Send email using ajax.
Script1
$('document').ready(function () {
$('form#contact-form').submit(function(e) {
var ref = $(this).find("[required]");
$(ref).each(function(){
if ( $(this).val() == '' )
{
alert("Required field should not be blank.");
$(this).focus();
e.preventDefault();
return false;
}
}); return true;
});
});
Script2
$('document').ready(function () {
$('form#contact-form').submit(function () {
var form = $(this);
var post_data = form.serialize(); //Serialized the form data for process.php
$('#loader').html('<img src="../spinner.gif" /> Please Wait...');
form.fadeOut(500, function () {
form.html("<h3>Thank you.").fadeIn();
$('#loader').html('');
});
// Normally would use this
$.ajax({
type: 'POST',
url: 'process.php', // Your form script
data: post_data,
success: function(msg) {
form.fadeOut(500, function(){
form.html(msg).fadeIn();
});
}
});
return false;
});
});

Answer 1

This script should work for you.
$('document').ready(function() {
$('form#contact-form').submit(function (e) {
var valid = true;
var ref = $(this).find("[required]");
$(ref).each(function(){
if ($(this).val() == '' )
{
alert("Required field should not be blank.");
$(this).focus();
e.preventDefault();
valid = false;
return false;
}
});
if (valid){
var form = $(this);
var post_data = form.serialize(); //Serialized the form data for process.php
$('#loader').html('<img src="../spinner.gif" /> Please Wait...');
form.fadeOut(500, function () {
form.html("<h3>Thank you.").fadeIn();
$('#loader').html('');
});
// Normally would use this
$.ajax({
type: 'POST',
url: 'process.php', // Your form script
data: post_data,
success: function(msg) {
form.fadeOut(500, function(){
form.html(msg).fadeIn();
});
}
});
}
});
});
Combined both script and added/ introduced "valid" variable to validate if 'required' fields are valid.