JavaScript Form Submit – Confirm or Cancel Submission Dialog Box

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For a simple form with an alert that asks if fields were filled out correctly, I need a function that does this:

  • Shows an alert box when button is clicked with two options:

    • If “OK” is clicked, the form is submitted
    • If cancel is clicked, the alert box closes and the form can be adjusted and resubmitted

I think a JavaScript confirm would work but I can’t seem to figure out how.

The code I have now is:

function show_alert() {
  alert("xxxxxx");
}
<form>
  <input type="image" src="https://stackoverflow.com/questions/6515502/xxx" border="0" name="submit" onclick="show_alert();" alt="PayPal - The safer, easier way to pay online!" value="Submit">
</form>

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