public int GetPosition(String str) {
		if (ChkKeyword(str, "center")) {
			return ScriptType.POSITION_CENTER;
		}
		if (ChkKeyword(str, "left")) {
			return ScriptType.POSITION_LEFT;
		}
		if (ChkKeyword(str, "right")) {
			return ScriptType.POSITION_RIGHT;
		}
		if (ChkKeyword(str, "bg") || ChkKeyword(str, "back")) {
			return ScriptType.POSITION_BACK;
		}
		if (ChkKeyword(str, "bgo") || ChkKeyword(str, "backonly")) {
			return ScriptType.POSITION_BACKONLY;
		}
		if (ChkKeyword(str, "overlap")) {
			return ScriptType.POSITION_OVERLAP;
		}
		NormalError("syntax error (position)");
		return ScriptType.POSITION_BACK;
	}