anchor.diff:  							var rtn = JSON.stringify(pool);
   							//console.log(rtn);
   							return rtn;
  +						},
  +						"child_s":function(){
  +							return pool[mother_id].child_s
  +						},
  +						"self":function(){
  +							return pool[mother_id];
   						},
   						"raw":function(){
   							var rtn = {};
  
positive.code: 								display_onscreen(for_add_target_s, child);
  							});
  						}
  					}catch(e){
  						console.log(e);
  					}
  
negative.code: 								}
  							});
  						});
  						draw_arrow_s();
  					}catch(e){
  						console.log(e);
  					}
  