detect robot

hi-bot.js

	void function () {
 		if (!window.tracker) {
 			return;
 		}
 		var events = ['scroll', 'click', 'mousemove', 'keydown', 'mousedown'];
 		for (var i = 0; i < events.length; i++) {
 			addHandler(document, events[i], detect);
 		}
 		function detect(event) {
 			for (var i = 0; i < events.length; i++) {
 				removeHandler(document, events[i], detect);
 			}
 			track(event)
 		}
 		function addHandler(element, type, handler) {
 			if (element.addEventListener) {
 				element.addEventListener(type, handler, false);
 			} else {
 				element.attachEvent('on' + type, handler)
 			}
 		}
 		function removeHandler(element, type, handler) {
 			if (element.removeEventListener) {
 				element.removeEventListener(type, handler);
 			} else {
 				element.detachEvent('on' + type, handler);
 			}
 		}
 		function track(event) {
 			var action = event.type;
 			tracker.evt('detect_robot', {human: '1', behavior: action});
 		}
 	}();