Redmine - View Customize - Shows gannt view starting 2 monthes ago

redmine-view-customize-gannt-starting-month.js

// ガントチャートを2ヶ月前開始で表示
// Shows gannt view starting 2 months ago
$(document).ready(function(){
	// configurable
	var monthsAgo = 2;
	var monthsRange = 6;
	// -----
	var now = new Date();
	var thisMonth = now.getMonth() + 1;
	var thisYear = now.getFullYear();
	var diff = thisMonth - monthsAgo;
	var startMonth = (diff > 0) ? diff : diff + 12;  
	var startYear = (diff > 0) ? thisYear : thisYear - 1;
	var link = $("#main-menu a.gantt");
	var original = link.attr("href");
	var modified = original + "?months=" + monthsRange + "&month=" + startMonth + "&year=" + startYear;
	link.attr("href", modified);
});