Set default values on creating Redmine ticket

redmine_set_default_values_on_new_ticket.user.js

// ==UserScript==
// @name           redmine_set_default_values_on_new_ticket
// @namespace      http://d.hatena.ne.jp/gnarl/
// @include        */issues/new*
// ==/UserScript==

(function() {
	var SET_ASSIGNED_TO_IF_ONLY_ONE_USER=true;
	var DEFAULT_TRACKER='2';

	var footer=document.getElementById('footer');
	if(!footer || !footer.childNodes[1] || footer.childNodes[1].href != 'http://www.redmine.org/')
		return;

	if(SET_ASSIGNED_TO_IF_ONLY_ONE_USER) {
		var issue_assigned_to=document.getElementById('issue_assigned_to_id');
		var users=issue_assigned_to.getElementsByTagName('option');
		if(users.length==2) {
			issue_assigned_to.value=users[1].value;
		}
	}
	if(DEFAULT_TRACKER) {
		var issue_tracker=document.getElementById('issue_tracker_id');
		issue_tracker.value=DEFAULT_TRACKER;
	}
})();