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function ontimerfnc(atimer){	if(something){		//aok, freeing the timer		atimer.cancel()	}else{		//leave the timer running	}}aTimer=nullfunction onloadfnc() {	aTimer = Components.classes["@mozilla.org/timer;1"]		.createInstance(Components.interfaces.nsITimer)	aTimerCallback={		notify: ontimerfnc	}	aTimer.initWithCallback(		aTimerCallback,		10000,		Components.interfaces.nsITimer.TYPE_REPEATING_SLACK	)	window.removeEventListener("load", onloadfnc, false)}window.addEventListener("load", onloadfnc, false)