Hi Everyone - Please Help

I am learning Java script on PDF. I have set each Required Field with a Pop Up if the section is clicked and not filled in

(Example)

f = getField(event.target.name)

if (f.value.length == 0)

    {

    f.setFocus()

    //Optional Message - Comment out the next line to remove

    app.alert("This field is required. Please enter your full name.")

    }

However, how do I make it so that the form is checked before being saved? I have searched and it seems as though I cannot however it looks like I can use a "Submit" box and add script there to not be hidden once the "required fields" are filled.

Once I put an "ok" box in, I entered the code for just the first page as this...

var aF = ["Text1", "Date2_af_date", "Initial343_es_:signer:initial", "Initial342_es_:signer:initial", "Initial341_es_:signer:initial", "Initial340_es_:signer:initial", "Initial339_es_:signer:initial", "Initial338_es_:signer:initial", "Initial337_es_:signer:initial", "Initial336_es_:signer:initial", "Initial335_es_:signer:initial", "Initial334_es_:signer:initial", "Initial333_es_:signer:initial", "Initial332_es_:signer:initial", "Initial331_es_:signer:initial", "Initial330_es_:signer:initial", "Initial329_es_:signer:initial", "Initial328_es_:signer:initial", "Initial327_es_:signer:initial", "Initial326_es_:signer:initial", "Initial325_es_:signer:initial", "Initial324_es_:signer:initial", "Initial323_es_:signer:initial", "Initial322_es_:signer:initial", "Initial321_es_:signer:initial", "Initial317_es_:signer:initial", "Initial318_es_:signer:initial", "Initial319_es_:signer:initial", "Initial320_es_:signer:initial"]; //change field names as needed

var sf = this.getField("Signature374");

sf.display = display.hidden;

for (var i = 0; i < aF.length; i++) {

   var v = this.getField(aF).value;

   if (v !== "") {

       sf.display = display.visible;

       break;

   }

After I enter this in, it does not do anything. I know I am missing some steps....

The form is 16 pages and it's an application for hire. The applicants are filling out the form over computer and we are saving it in a folder.

I have been teaching myself how to do this so if you can help with a step by step, I would really appreciate it.