	startTimer: function(timer_name, time_value) {
		if(timer_name) {
			if (timer_name === "t_page") {
				this.endTimer("t_resp", time_value);
			}
			impl.timers[timer_name] = {start: (typeof time_value === "number" ? time_value : BOOMR.now())};
		}

		return this;
	},