anchor.diff:      var s16=$['textarea16'];
       canvasClear();
       if (select.options[select.selectedIndex].value == "2") {    //将2进制转换成8进制
  -      s10.value = cal_to_10(2,s).toString();
  -
  -      cal_10_to_draw(8,s10.value);
  +
       }
       else if (select.options[select.selectedIndex].value == "8") {
  -      //null
  +      var ss = cal_to_10(8,s).toString();
  +      cal_to_10_draw(8,s.value);
  +      cal_10_to_draw(2,ss);
       }
       else if (select.options[select.selectedIndex].value == "10") {
  -
  +      cal_10_to_draw(2,s.value);
       }
       else if (select.options[select.selectedIndex].value == "16") {
  +      var ss = cal_to_10(16,s).toString();
  +      cal_to_10_draw(16,s.value);
  +      cal_10_to_draw(2,ss);
       }
       else {
         window.alert('Please choose the right number!!');
  
positive.code:   }
  
    void present16(Event e, var detail, Node target) {
  
    }
  
    int cal_to_10_draw(int jz, var input) {    //将其他进制转换为10进制的图画画出来
  
negative.code:     var s16=$['textarea16'];
      canvasClear();
      if (select.options[select.selectedIndex].value == "2") {    //将2进制转换成8进制
        var ss = cal_to_10(2,s).toString();
        cal_to_10_draw(2,s.value);
        cal_10_to_draw(8,ss);
      }
      else if (select.options[select.selectedIndex].value == "8") {
        //null
      }
      else if (select.options[select.selectedIndex].value == "10") {
        cal_10_to_draw(8,s.value);
      }
      else if (select.options[select.selectedIndex].value == "16") {
        var ss = cal_to_10(16,s).toString();
        cal_to_10_draw(16,s.value);
        cal_10_to_draw(8,ss);
      }
      else {
        window.alert('Please choose the right number!!');
  