gistfile1.js

jQuery(':button, :submit, #post-preview, .submitdelete', '#submitpost').each(function(){
  var t = jQuery(this);
	if ( t.hasClass('button-primary') )
		t.addClass('button-primary-disabled');
	else
		t.addClass('button-disabled');

	t.prop('disabled', true);
	
	t.on('click', function() {
		alert("Are you sure?");
	} );
});