$('#delete').submit(function(event){
     if(!confirm("some text")){
        event.preventDefault();
      }
    });

$('#myForm').submit(function() {
    var c = confirm("Click OK to continue?");
    return c; //you can just return c because it will be true or false
});

You could use a "flag" to know if the confirmation occured or not to "prevent default" submit behavior.

Remove the inline onsubmit = "ValidateMyform(this);" and use a jQuery event handler instead.

var confirmed = false;
$("#ReceptionForm").on("submit", function(e){

  // if confirm == true here
  // And if the form is valid...

  // the event won't be prevented and the confirm won't show.
  if(!confirmed && ValidateMyform($(this)[0]) ){
    e.preventDefault();

    $.confirm({
      title: 'Confirm!',
      content: 'Are you sure?',
      buttons: {
        No: function () {
          return;
        },
        Yes: function () {
          confirmed = true;
          $("#ReceptionForm").submit();
        }
      }
    });
  }
});

Add onclick event to the button you want confirmation. When return false, the form will not be summited.

<button type = "submit" name = "action" value = "delete" class="btn btn- 
default" id = 'deleteAccount' onclick='return confirm("Are you sure?");'>Delete Account</button>

Hmm... theres is a problem with the other answers on here: they don't work against your HTML.

There's a bug in jQuery (I assume it's a bug), where if an element on your form has aname of submit, then triggering the submit event of the form will not work.

You will need to remove the name attribute from your input type="submit" button or simply give it a name other than "submit".

HTML

<form action ="/submit-page/" method='post' class="editable">
  <fieldset>
    <select name="status" id='status'>
      <option value="Submitted">Submitted</option>
      <option value="Canceled">Canceled</option>
      <option value="Application">Application</option>
    </select>
    <input type="submit" value="SAVE" name="submit-button"/>
  </fieldset>
</form>​

jQuery

$('#status').on('change', function() {

    var $this = $(this),
        val = $this.val();

    if (val === 'Canceled' && confirm("are you sure?")) {
        $this.closest('form').submit();
    }
});​

PHP

$submitted = !empty($_POST['submit-button']);

if($submitted)
{
    // Submit button was pressed.
}
else
{
    // Form was submitted via alternate trigger.
}

Example

Working: http://jsfiddle.net/xixonia/KW5jp/

Not Working: http://jsfiddle.net/xixonia/KW5jp/1/

Edit

You have since updated your question, and this answer is no longer a valid solution for what you are looking for. Instead, look at Chris Platt's answer.

Edit Again

This is a modified version of Chris Platt's answer. It simply waits until the DOM is ready (elements are loaded) before it executes the logic contained within the first $(...).

$(function() { // this first jQuery object ensures that...

    /// ... the code inside executes *after* the DOM is ready.

    $('form.editable').submit(function(){
        if ($('#status').val()=='Canceled') {
            if (!confirm('Warning message here. Continue?')) {
                return false;
            }
        }
    });

});