onClipEvent (load) {
	str = "abcdefghij";
	speed = 4;     //スピード設定
	time = 0;
	num = 0;
}
onClipEvent (enterFrame) {
	time ++;
	if (time <= speed) {
		if (num < str.length) {
			_root.strDisplay = str.substr(0,num+1);
			num ++;
		} else {
			_root.gotoAndStop("end");
		}
		time = 0;
	}
}