JavaScript/jQuery: Detect a click outside an element. Used for deactivating a drop down menu.

click_outside.js

//detect click outside http://bassta.bg/2013/08/detect-click-event-outside-element/
var everything = jQuery(window);
var menuBody = jQuery(".menu-body");
var menu = jQuery(".menu");
var menuButtonClass = 'mobile-menu-button-img';

everything.on("click.yayMark", function (event) {
    var menuButtonClicked = event.target.className == menuButtonClass;
    if (menuBody.has(event.target).length == 0
        && !menuBody.is(event.target)
        && !menuButtonClicked) {
        if (menu.css('display') == 'block') {
            menu.toggle();
        }
    }
});