Java Script Mathmatic Equation

我的JavaScript代碼不工作，因爲當我點擊按鈕時沒有任何東西顯示出來。有人知道解決方案嗎？我已經嘗試拿出代碼並將按鈕的格式設置爲alert(...)，並且它可以工作，所以現在我被卡在數學方程式上了。我很積極，儘管我沒有錯過任何括號或標點符號。感謝您的反饋和幫助。Java Script Mathmatic Equation

<!DOCTYPE html> 
<html> 
    <head> 
     <title>Project</title> 
     <style type="text"/css> 
      .inbox 
      { 
       width=30px; 
       text-align: right; 
       border: 2px solid black; 
      } 
      .align 
      { 
       text-align: right 
      } 
     </style> 
     <script type="text/javascript"> 
      function compute() { 
       var a = form1.inputA.value; 
       a = parseFloat(a); 
       var b = form1.inputB.value; 
       b = parseFloat(b); 
       var c = form1.inputC.value; 
       c = parseFloat(c); 
       var e = a * 5.49; 
       form1.sumA.value = e.toFixed(2); 
      } 
      function pageInit() 
      { 
       form1.inputA.focus(); 
      } 
     </script> 
    </head> 
    <body onload="pageInit();"> 
     <form id="form1"> 
      <table border="2" > 
       <tr> 
        <th colspan="4">Sample Order Form</th> 
       </tr> 
       <tr> 
        <th>Quantity</th> 
        <th>item</th> 
        <th>Unit Price</th> 
        <th>Totals</th> 
       </tr> 
       <tr> 
        <th> 
         <input tabindex="1" class="inbox" type="text" id="inputA" /> 
        </th> 
        <th>Apples</th> 
         <td>$5.49</td> 
         <th> 
          <input class="inbox" type="text" id="sumA" readonly="readonly" /> 
         </th> 
       </tr> 
       <tr> 
        <th> 
         <input tabindex="4" type="button" value="Compute" onclick="compute();" /> 
        </th> 
       </tr> 
      </table> 
     </form> 
    </body> 
</html>

來源

2014-10-30 Austin Hawks

所以是java或JavaScript的？ – 2014-10-30 05:40:12

它是javascript – 2014-10-30 05:53:19

您應該重新格式化您的問題 – 2014-10-30 06:01:24

試試這個

<!DOCTYPE html> 
<html> 
<head> 
    <title>Project</title> 
    <style> 
     .inbox { 
      width =30px; 
      text-align: right; 
      border: 2px solid black; 
     } 

     .align { 
      text-align: right; 
     } 
    </style> 
    <script type="text/javascript"> 

     function compute() { 
      var a = document.getElementById("inputA").value; 
      var e = a * 5.49; 
      document.getElementById("sumA").value = e.toFixed(2); 
     } 
     function pageInit() { 
      document.getElementById("inputA").focus(); 
     } 
    </script> 
</head> 
<body onload="pageInit();"> 
    <form id="form1"> 
     <table border="2"> 
      <tr> 
       <th colspan="4">Sample Order Form</th> 
      </tr> 
      <tr> 
       <th>Quantity</th> 
       <th>item</th> 
       <th>Unit Price</th> 
       <th>Totals</th> 
      </tr> 
      <tr> 
       <th> 
        <input tabindex="1" class="inbox" type="text" id="inputA" /> 
       </th> 
       <th>Apples</th> 
       <td>$5.49</td> 
       <th> 
        <input class="inbox" type="text" id="sumA" readonly="readonly" /> 
       </th> 
      </tr> 
      <tr> 
       <th> 
        <input tabindex="4" type="button" value="Compute" onclick="compute();" /> 
       </th> 
      </tr> 
     </table> 
    </form> 
</body> 
</html>

來源

2014-10-30 06:28:47 Urielzen

Java Script Mathmatic Equation

回答

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