與JavaScript有問題的計算的onclick

Question

我得到了下面的代碼：

<form action ="" name="References" > 
    <table> 
    <tr> 
     <td> 
     Reference 1 
     </td> 
     <td> 
      <a href=""></a> 
      <select name="reference1"> 
       <option value="4">Excellent</option> 
       <option value="3">Good</option> 
       <option value="2">Neutral</option> 
       <option value="1">I will not recommend it</option> 
      </select>    
     </td> 
    </tr> 
    <tr> 
     <td> 
     Reference 2 
     </td> 
     <td> 
      <a href=""></a> 
      <select name="reference2"> 
       <option value="4">Excellent</option> 
       <option value="3">Good</option> 
       <option value="2">Neutral</option> 
       <option value="1">I will not recommend it</option> 
      </select>    
     </td> 
    </tr> 
    <tr> 
     <td> 
     Reference 3 
     </td> 
     <td> 
      <a href=""></a> 
      <select name="reference3"> 
       <option value="4">Excellent</option> 
       <option value="3">Good</option> 
       <option value="2">Neutral</option> 
       <option value="1">I will not recommend it</option> 
      </select>    
     </td> 
    </tr> 
    <tr> 
     <td> 
     Average rating 
     </td> 
     <td> <input type="text" name="averageRating" size="4" />   
     </td> 
    </tr> 
    </table> 
    <p> 
    <input type="button" value="Calculate" onclick=" 

     document.forms['References'].elements['averageRating'].value = 0; 
     for (x = 1 ; x <=3; x++) { 
      document.forms['References'].elements['averageRating'].value = 
       parseInt(document.forms['References'].elements['averageRating'].value) + 
              parseInt(document.forms['References'].elements['reference'+x].value);  
     } 
      document.forms['References'].elements['averageRating'].value = 
       parseInt(document.forms['References'].elements['averageRating'].value)/3; 
     "; /> 
    </p> 
    </form> 

我只好再編輯代碼，包括6名，我因此標有「參考」，但我的onclick似乎並沒有被對。除了增加3個引用到現有的3個（總共6個）之外，我還必須爲每個引用1個值。我所擁有的是這樣的：

<form action ="" name="References" > 
    <table> 
    <tr> 
     <td> 
     Reference 1 
     </td> 
     <td> 
      <a href=""></a> 
      <select name="reference1"> 
       <option value="5">Very Satisfied</option> 
       <option value="4">Satisfied</option> 
       <option value="3">Neutral</option> 
       <option value="2">Dissatisfied</option> 
       <option value="1">I will not recommend it</option> 
      </select>    
     </td> 
    </tr> 
    <tr> 
     <td> 
     Reference 2 
     </td> 
     <td> 
      <a href=""></a> 
      <select name="reference2"> 
       <option value="5">Very Satisfied</option> 
       <option value="4">Satisfied</option> 
       <option value="3">Neutral</option> 
       <option value="2">Dissatisfied</option> 
       <option value="1">I will not recommend it</option> 
      </select>    
     </td> 
    </tr> 
    <tr> 
     <td> 
     Reference 3 
     </td> 
     <td> 
      <a href=""></a> 
      <select name="reference3"> 
       <option value="5">Very Satisfied</option> 
       <option value="4">Satisfied</option> 
       <option value="3">Neutral</option> 
       <option value="2">Dissatisfied</option> 
       <option value="1">I will not recommend it</option> 
      </select>    
     </td> 
    </tr> 
    <tr> 
     <td> 
     Reference 4 
     </td> 
     <td> 
      <a href=""></a> 
      <select name="reference4"> 
       <option value="5">Very Satisfied</option> 
       <option value="4">Satisfied</option> 
       <option value="3">Neutral</option> 
       <option value="2">Dissatisfied</option> 
       <option value="1">I will not recommend it</option> 
      </select>    
     </td> 
    </tr> 
    <tr> 
     <td> 
     Reference 5 
     </td> 
     <td> 
      <a href=""></a> 
      <select name="reference5"> 
       <option value="5">Very Satisfied</option> 
       <option value="4">Satisfied</option> 
       <option value="3">Neutral</option> 
       <option value="2">Dissatisfied</option> 
       <option value="1">I will not recommend it</option> 
      </select>    
     </td> 
    </tr> 
    <tr> 
     <td> 
     Reference 6 
     </td> 
     <td> 
      <a href=""></a> 
      <select name="reference6"> 
       <option value="5">Very Satisfied</option> 
       <option value="4">Satisfied</option> 
       <option value="3">Neutral</option> 
       <option value="2">Dissatisfied</option> 
       <option value="1">I will not recommend it</option> 
      </select>    
     </td> 
    </tr> 
    <tr> 
     <td> 
     Average rating 
     </td> 
     <td> <input type="text" name="averageRating" size="4" />   
     </td> 
    </tr> 
    </table> 
    <p> 
    <input type="button" value="Calculate" onclick=" 

     document.forms['References'].elements['averageRating'].value = 0; 
     for (x = 1 ; x <=4; x++) { 
      document.forms['References'].elements['averageRating'].value = 
       parseInt(document.forms['References'].elements['averageRating'].value) + 
              parseInt(document.forms['References'].elements['reference'+x].value);  
     }    
      document.forms['References'].elements['averageRating'].value = 
       parseInt(document.forms['References'].elements['averageRating'].value)/6; 
     "; /> 

6的得分爲5各等級應爲30，然後除以6（獲取平均）我應該結束了5，這是我做的。但是如果我有一個5分的評分，那麼剩下的1分，即5 + 1 + 1 + 1 + 1 + 1 = 10和10/6是1.67，但最終我的答案是1.33。這個補充似乎沒有適當地加起來，我不確定還有其他什麼，或者我應該編輯哪些內容才能正確使用。

Answer 1

你只有六個要素四迭代中，對於條件更改爲x <= 6