jquery warn if leaving page without clicking the save button

Question

The following code executes a warning if you change data on the page and then leave the page. I want that - except when the user presses the save button.

This is the jquery code:

$(document).ready(function() {
  formmodified=0;
    $('form *').change(function(){
        formmodified=1;
    });
  window.onbeforeunload = confirmExit;
    function confirmExit() {
      if (formmodified == 1) {
          return "New information not saved. Do you wish to leave the page?";
      }
  }
});

This is the button that saves the data:

<input class="btn-primary" name="commit" type="submit" value="Save Material">

UPDATE Thanks tymeJV !!!!!!!

In case someone else need it, this works:

$(document).ready(function() {
    formmodified=0;
    $('form *').change(function(){
        formmodified=1;
    });
    window.onbeforeunload = confirmExit;
    function confirmExit() {
        if (formmodified == 1) {
            return "New information not saved. Do you wish to leave the page?";
        }
    }
    $("input[name='commit']").click(function() {
        formmodified = 0;
    });
});

Answer 1

Given your save button info:

<input class="btn-primary" name="commit" type="submit" value="Save Material">

You can set the value of formmodified

$("input[name='commit']").click(function() {
    formmodified = 0;
});

Your check at the end shouldn't be triggered now