Question

I assign the element id “btn_submit” to write_ok button.

I wanted the following:

if I press write_ok button,
  do write,
else (if I do not press write_ok button)
  do alert message before page exit.

I don’t know how can i find out which button was pressed.

I found this, but I cannot get it to work: jQuery: how to get which button was clicked upon form submission?

<script type="text/javascript">
$(window).bind('beforeunload', function(){
    if ( #btn_submit was not pressed )
        return 'If you exit the page, you may lose your changes';
});
</script>

Answer 1

You can do something like,

<script type="text/javascript">
  var btn_submit_pressed = false;

  $(window).bind('beforeunload', function(){
      if ( btn_submit_pressed )
          return 'If you want to exit page, you may lost your writing';
  });

  $('#btn_submit').click(function(){ btn_submit_pressed=true; });

</script>