code: function(){
  		var piece = this.getcell_excell(); /* piece : cell or excell */
  		if(piece.isnull){ return;}
  
  		var group = piece.group;
  		if(group==='excell' || (group==='cell' && piece!==this.cursor.getc())){
  			this.setcursor(piece);
  		}
  		else if(group==='cell'){
  			this.input51_main(piece);
  		}
  	}
docs: --------------------------------------------------------------------------- mv.input51()            inputMode=='auto'時に[＼]を作ったり消したりする ---------------------------------------------------------------------------