// JavaScript Document
var PerfTimer = (function(){
	var _sTime, _eTime;
	var _self = {
		Start: function() { _sTime = (new Date()).valueOf(); },
		Stop: function() { _eTime = (new Date()).valueOf(); },
		Duration: function() {
			return (_eTime - _sTime)/1000;
		}
	};
	return _self;
})();