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//fix IE first open
(function (con) {
    'use strict';
    var prop, method;
    var empty = {};
    var dummy = function () { };
    var properties = 'memory'.split(',');
    var methods = ('assert,count,debug,dir,dirxml,error,exception,group,' +
        'groupCollapsed,groupEnd,info,log,markTimeline,profile,profileEnd,' +
        'time,timeEnd,trace,warn').split(',');
    while (prop = properties.pop()) con[prop] = con[prop] || empty;
    while (method = methods.pop()) con[method] = con[method] || dummy;
})(window.console = window.console || {});