jQueryValidate - Empty Password not stopping form - html

Question

I have a simple form using jQueryValidate:
$("#frmMain").validate();
Leaving an empty Email will cause the validation to show and the form to stop, the password can strangely be left blank and the form submits.
What changes do I need to ensure the form doesn't submit when the password is empty, like the email does now:
<form action="Login" id="frmMain" method="post" name="frmMain" role="form">
<input class="input-validation-error form-control" data-msg-email="The Email field is not a valid e-mail address." data-msg-required="The Email field is required." data-rule-email="true" data-rule-required="true" id="Email" name="Email" type="email" />
<input autocomplete="off" class="input-validation-error form-control" data-val="true" data-val-length="The new password must be at least 8 characters long" data-val-length-max="15" data-val-length-min="8" data-val-required="Password is required" id="Password" name="Password" type="password" />
Note, I set the default values for the validator:
submitHandler: function (form) {
if ($(form).valid()) {
form.submit();
}
}

Answer 1

The code here is redundant and superfluous...
submitHandler: function (form) {
if ($(form).valid()) {
form.submit();
}
}
You don't need if form.valid() because the submitHandler only fires on a valid form. (Your conditional if will never be false).
You don't need form.submit() because this is the default behavior when the form is valid. (the form action will fire)
That leaves nothing... so you don't need to specify a custom submitHandler for this case at all. (it can be left out entirely as I did in jsFiddle below)
Quote OP:
"... the password can strangely be left blank and the form submits. What changes do I need to ensure the form doesn't submit when the password is empty"
What is so strange when no rule was specified that mandates the field be filled? If you need to stop submit when the password is blank, you need the required rule. Just compare the attributes from the email field to the password field and you'll see that data-rule-required is where the required rule is specified...
data-rule-required="true"
Add this attribute to the password field and now the field must be filled out.
Working DEMO: http://jsfiddle.net/tv49y/