var URLlength:int = myURL.length;
for (var i=0; i<URLlength; i++) {
	 this["mybtn"+i].id = i;
	this["mybtn"+i].requestURL=new URLRequest(myURL[i]);
	this["mybtn"+i].addEventListener(MouseEvent.CLICK,mybtnjump(this.id));
}

function mybtnjump(id:Number) {
	var requestURL:URLRequest = new URLRequest(myURL[id]);
	navigateToURL(requestURL);
}
if(条件){
	mybtnjump(1);
}