jQuery / Ajax PHP POST调用

Question

I am posting a form with the following:

if ( flag ) {
jQuery.ajax({
    url: 'submit_licence.php',
    dataType: 'json',
    type: 'POST',
    data: 'flag=' + flag + '&region=' + jQuery('#licenceRegion').val() + '&lnum=' + jQuery('#enterLicence').val() + '&fname=' + jQuery('#fname').val() + '&lname=' + jQuery('#lname').val(),
    success: function( data ) {

    }
});
}

The HTML

<input class="buttondb4 white2 large" type="text" value=" " id="enterLicence" />
<input type="hidden" name="licenceRegion" id="licenceRegion" value="" /> 
<input type="hidden" name="fname" id="fname" value="First" /> 
<input type="hidden" name="lname" id="lname" value="Last" />

and my PHP:

if ($_POST){
$lnum     = noescape($_POST['lnum']);
$fname    = noescape($_POST['fname']);
$lname    = noescape($_POST['lname']);
$region   = noescape($_POST['region']);
$flag     = noescape($_POST['flag']);  

//mysql query here

}

But when its posted, it is not retrieving any of the posted data (the posted values are blank)

Why is it not pulling the data? What am I missing? What have I done wrong?

Unfortunately I cannot post the entire script/page due to it being a private project for a client although I think I have provided enough information for what I am trying to do.

Answer 1

Read this on SO

You need to wait for the return of the function:

onSubmit="return sendData()"

Otherwise the form will be submitted immediatly and does'nt wait till data is changed.

inside the function replace this

document.data.submit();

with this:

return true;

Link posted in comment above