$(document).ready(function() {
	var formAction = $("form.jumpmenu").attr("action");
	
	$("select").change(function () {
		formAction = $(this).attr("value");
		$("form.jumpmenu").attr({action: formAction})
		//$("form.jumpmenu").submit(); 
	})
/* to trigger on button click, comment out $(form.jumpmenu).submit line above and uncomment .trigger line below */

.trigger('change');

});