I need some javascript added to the html below so that the checkbox status becomes persistent on click of the checkbox. If a user leaves the site and returns, the status of each box should still be the same. Javascript should be generic enough to be dropped into, say, a Wordpress environment.
<form method="post" action="/" name="dummy">
<input name="check1" type="checkbox">bla bla<br><br>
<input name="check2" type="checkbox">bla bla<br><br>
<input name="check3" type="checkbox">bla bla<br><br>
</form>