get dateTime of string of date in native javascript

settingDateTime.js

    /**
     * function setting datetime compatible multiple navigator chrome and firefox
     * @param stringDate 2014-07-28 03:42:23
     */
    function _settingDateTime(stringDate) {
        var myDate = new Date();
        //string
        var arrayDate = stringDate.split(' ');
        if (arrayDate.length > 0) {
            var date = arrayDate[0];
            var time = arrayDate[1];

            var dateSplit = date.split('-');
            var timeSplit = time.split(':');
            myDate.setFullYear (dateSplit[0]);
            myDate.setMonth (dateSplit[1]-1);
            myDate.setDate (dateSplit[2]);
            myDate.setHours (timeSplit[0]);
            myDate.setMinutes (timeSplit[1]);
            myDate.setSeconds(timeSplit[2]);
        } else {
            myDate = false;
        }

        return myDate;
    }