code: function check_chain_group_scripts_ready(chain_group) {
  		var any_scripts_ready = false;
  		for (var i=0; i<chain_group.scripts.length; i++) {
  			if (chain_group.scripts[i].ready && chain_group.scripts[i].exec_trigger) {
  				any_scripts_ready = true;
  				chain_group.scripts[i].exec_trigger();
  				chain_group.scripts[i].exec_trigger = null;
  			}
  		}
  		return any_scripts_ready;
  	}
docs: does the chain group have any ready-to-execute scripts?