void setHbond() throws ScriptException {
		checkLength3();
		boolean bool = false;
		switch (statement[2].tok) {
		case Token.backbone:
			bool = true;
			// fall into
		case Token.sidechain:
			viewer.setBooleanProperty("hbondsBackbone", bool);
			break;
		case Token.solid:
			bool = true;
			// falll into
		case Token.dotted:
			viewer.setBooleanProperty("hbondsSolid", bool);
			break;
		default:
			invalidArgument();
		}
	}