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/*!
 * eventie v1.0.6
 * event binding helper
 *   eventie.bind( elem, 'click', myFn )
 *   eventie.unbind( elem, 'click', myFn )
 * MIT license
 */

/*jshint browser: true, undef: true, unused: true */
/*global define: false, module: false */

(function (window) {

    'use strict';

    var docElem = document.documentElement;

    var bind = function () {
    };

    function getIEEvent(obj) {
        var event = window.event;
        // add event.target
        event.target = event.target || event.srcElement || obj;
        return event;
    }

    if (docElem.addEventListener) {
        bind = function (obj, type, fn) {
            obj.addEventListener(type, fn, false);
        };
    } else if (docElem.attachEvent) {
        bind = function (obj, type, fn) {
            obj[type + fn] = fn.handleEvent ?
                function () {
                    var event = getIEEvent(obj);
                    fn.handleEvent.call(fn, event);
                } :
                function () {
                    var event = getIEEvent(obj);
                    fn.call(obj, event);
                };
            obj.attachEvent("on" + type, obj[type + fn]);
        };
    }

    var unbind = function () {
    };

    if (docElem.removeEventListener) {
        unbind = function (obj, type, fn) {
            obj.removeEventListener(type, fn, false);
        };
    } else if (docElem.detachEvent) {
        unbind = function (obj, type, fn) {
            obj.detachEvent("on" + type, obj[type + fn]);
            try {
                delete obj[type + fn];
            } catch (err) {
                // can't delete window object properties
                obj[type + fn] = undefined;
            }
        };
    }

    var eventie = {
        bind: bind,
        unbind: unbind
    };

// ----- module definition ----- //

    if (typeof define === 'function' && define.amd) {
        // AMD
        define(eventie);
    } else if (typeof exports === 'object') {
        // CommonJS
        module.exports = eventie;
    } else {
        // browser global
        window.eventie = eventie;
    }

})(window);