YYYYMMDDHHMMSS Date Format

HTML

<div id="divDate"></div>

JavaScript

var dateDiv = document.getElementById('divDate');

Object.defineProperty(Date.prototype, 'YYYYMMDDHHMMSS', {
    value: function() {
        function pad2(n) {  // always returns a string
            return (n < 10 ? '0' : '') + n;
        }

        return this.getFullYear() +
               pad2(this.getMonth() + 1) + 
               pad2(this.getDate()) +
               pad2(this.getHours()) +
               pad2(this.getMinutes()) +
               pad2(this.getSeconds());
    }
});

dateDiv.innerHTML = new Date().YYYYMMDDHHMMSS();