code: function(){
  		var piece = this.getcell_excell(); /* piece : cell or excell */
  		if(piece.isnull || (this.mouseCell===piece && !this.mouseend)){ return;}
  
  		if(this.mousestart && (piece!==this.cursor.getobj() || piece.ques!==51)){
  			this.setcursor(piece);
  			this.mousereset();
  		}
  		else if((this.mousestart && this.cursor.getNumOfTarget(piece)<2) || this.mouseend){
  			this.inputqnum_main(piece);
  			this.mousereset();
  		}
  		else{
  			this.mouseCell = piece;
  			this.inputselect_cell51(piece);
  		}
  	}
docs: --------------------------------------------------------------------------- mv.inputqnum_cell51()   [＼]のCellに数字を入力する ---------------------------------------------------------------------------