if (this.JSON && !this.JSON.parseWithDate)
{
	var reISO = /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(\.?:\d*)?)Z$/;
	var reMsAjax = /^\/Date\((d|-|.*)\)[\/|\\]$/;

	JSON.parseWithDate = function (json)
	{
		/// <summary>  
		/// parses a JSON string and turns ISO or MSAJAX date strings  
		/// into native JS date objects  
		/// </summary>      
		/// <param name="json" type="var">json with dates to parse</param>          
		/// </param>  
		/// <returns type="value, array or object" />  
		try
		{
			var res = JSON.parse(json,
				function (key, value)
				{
					if (typeof value === 'string')
					{
						var a = reISO.exec(value);
						if (a)
							return new Date(Date.UTC(+a[1], +a[2] - 1,
													 +a[3], +a[4], +a[5], +a[6]));
						a = reMsAjax.exec(value);
						if (a)
						{
							var b = a[1].split(/[-+,.]/);
							return new Date(b[0] ? +b[0] : 0 - +b[1]);
						}
					}
					return value;
				});
			return res;
		} catch (e)
		{
			// orignal error thrown has no error message so rethrow with message  
			//throw new Error("JSON content could not be parsed");
			throw e;
			return null;
		}
	};
	JSON.dateStringToDate = function (dtString)
	{
		/// <summary>  
		/// Converts a JSON ISO or MSAJAX string into a date object  
		/// </summary>      
		/// <param name="" type="var">Date String</param>  
		/// <returns type="date or null if invalid" />   
		var a = reISO.exec(dtString);
		if (a)
			return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3],
									 +a[4], +a[5], +a[6]));
		a = reMsAjax.exec(dtString);
		if (a)
		{
			var b = a[1].split(/[-,.]/);
			return new Date(+b[0]);
		}
		return null;
	};
}