驗證輸入字段值是否爲0，則忽略

我需要幫助，我怎麼能忽略輸入字段，如果該值爲「0」 ..在JavaScript驗證輸入字段值是否爲0，則忽略

所以基本上如果值爲「0」不發送如果您發送PayPal的內容爲「0」，則Paypal的內容會給出錯誤

想法是讓用戶選擇產品白色或黑色和數量..說用戶只需要2個黑色項目和0個白色那麼它應該只發送任何值爲1或更多的值給paypal。

我需要的是爲它工作的代碼..我會比高興地發送PayPal捐贈您的代碼更多...

感謝您的幫助..

<form method="post" name="mainForm" action="https://www.paypal.com/cgi-bin/webscr"> 
<input type="hidden" name="cmd" value="_cart"> 
<input type="hidden" name="upload" value="1"> 
<input type="hidden" name="business" value="[email protected]"> 
<input type="hidden" name="currency_code" value="USD"> 


<!--First Item--> 
<p> 
<input type="hidden" name="item_name_1" value="WHITE Helping Hand"> 
<input type="hidden" name="item_number_1" value="WHITE-HH"> 
<input type="hidden" name="amount_1" value="10.00"> 
<select name="quantity_1" value=""> 
    <option value="0">0</option> 
    <option value="1">1</option> 
    <option value="2">2</option> 
    <option value="3">3</option> 
    <option value="4">4</option> 
    <option value="5">5</option> 
    <option value="6">6</option> 
    <option value="7">7</option> 
    <option value="8">8</option> 
    <option value="9">9</option> 
    <option value="10">10</option> 
    </select> 
</p> 

<!--Second Item--> 
<p> 
<input type="hidden" name="item_name_2" value="BLACK Helping Hand"> 
<input type="hidden" name="item_name_2" value="BLACK-HH"> 
<input type="hidden" name="amount_2" value="10.00"> 
<select name="quantity_2" value=""> 
    <option value="0">0</option> 
    <option value="1">1</option> 
    <option value="2">2</option> 
    <option value="3">3</option> 
    <option value="4">4</option> 
    <option value="5">5</option> 
    <option value="6">6</option> 
    <option value="7">7</option> 
    <option value="8">8</option> 
    <option value="9">9</option> 
    <option value="10">10</option> 
    </select> 
</p> 
<br> 

<input type="hidden" name="return" value="http://www.360mix.com/thankyou.html"> 
<input type="image" src="http://images.paypal.com/en_US/i/btn/x-click-but22.gif" border="0" name="submit" width="87" height="23" alt="Make payments with PayPal - it's fast, free and secure!"> 
</form>

來源

2014-03-01 user3368657

禁用表單的onsubmit事件偵聽器 –

試試下面的例子。這個想法是檢查每個數量是否爲零。如果不是，請分配下一個項目編號。

<html> 
    <head> 
     <script type="text/javascript"> 
      function prepareForm() { 
       var index = 1; 

       var q1 = document.getElementById('quantity_1').value; 

       if (q1 > 0) { 
        document.getElementById('item_name_1').setAttribute('name', 'item_name_' + index); 
        document.getElementById('item_number_1').setAttribute('name', 'item_number_' + index); 
        document.getElementById('amount_1').setAttribute('name', 'amount_' + index); 
        document.getElementById('quantity_1').setAttribute('name', 'quantity_' + index); 
        index++; 
       } else { 
        // reset (in case back button is pressed) 
        document.getElementById('item_name_1').setAttribute('name', ''); 
        document.getElementById('item_number_1').setAttribute('name', ''); 
        document.getElementById('amount_1').setAttribute('name', ''); 
        document.getElementById('quantity_1').setAttribute('name', '');     
       } 

       var q2 = document.getElementById('quantity_2').value; 

       if (q2 > 0) { 
        document.getElementById('item_name_2').setAttribute('name', 'item_name_' + index); 
        document.getElementById('item_number_2').setAttribute('name', 'item_number_' + index); 
        document.getElementById('amount_2').setAttribute('name', 'amount_' + index); 
        document.getElementById('quantity_2').setAttribute('name', 'quantity_' + index); 
        index++; 
       } else { 
        // reset (in case button is pressed) 
        document.getElementById('item_name_2').setAttribute('name', ''); 
        document.getElementById('item_number_2').setAttribute('name', ''); 
        document.getElementById('amount_2').setAttribute('name', ''); 
        document.getElementById('quantity_2').setAttribute('name', '');     
       } 

       if (index == 1) { 
         // in index is still one, then all quantities are zero 
         return false; // do not submit 
       } 

       return true; 
      } 
     </script> 
    </head> 
    <body> 
<form method="post" name="mainForm" action="https://www.paypal.com/cgi-bin/webscr" onSubmit="return prepareForm();"> 
<input type="hidden" name="cmd" value="_cart"> 
<input type="hidden" name="upload" value="1"> 
<input type="hidden" name="business" value="[email protected]"> 
<input type="hidden" name="currency_code" value="USD"> 


<!--First Item--> 
<p> 
<input type="hidden" id="item_name_1" value="WHITE Helping Hand"> 
<input type="hidden" id="item_number_1" value="WHITE-HH"> 
<input type="hidden" id="amount_1" value="10.00"> 
<select id="quantity_1"> 
    <option value="0">0</option> 
    <option value="1">1</option> 
    <option value="2">2</option> 
    <option value="3">3</option> 
    <option value="4">4</option> 
    <option value="5">5</option> 
    <option value="6">6</option> 
    <option value="7">7</option> 
    <option value="8">8</option> 
    <option value="9">9</option> 
    <option value="10">10</option> 
    </select> 
</p> 

<!--Second Item--> 
<p> 
<input type="hidden" id="item_name_2" value="BLACK Helping Hand"> 
<input type="hidden" id="item_number_2" value="BLACK-HH"> 
<input type="hidden" id="amount_2" value="10.00"> 
<select id="quantity_2" value=""> 
    <option value="0">0</option> 
    <option value="1">1</option> 
    <option value="2">2</option> 
    <option value="3">3</option> 
    <option value="4">4</option> 
    <option value="5">5</option> 
    <option value="6">6</option> 
    <option value="7">7</option> 
    <option value="8">8</option> 
    <option value="9">9</option> 
    <option value="10">10</option> 
    </select> 
</p> 
<br> 

<input type="hidden" name="return" value="http://www.360mix.com/thankyou.html"> 
<input type="image" src="http://images.paypal.com/en_US/i/btn/x-click-but22.gif" border="0" name="submit" width="87" height="23" alt="Make payments with PayPal - it's fast, free and secure!"> 
</form> 
</body> 
</html>

來源

2014-03-01 19:57:43 antoniom

@ user3368657我很高興能幫助那些0場，請刪除您的電子郵件，任何人任何人都可以看到這樣的敏感信息！ – antoniom

再次感謝您...此代碼爲我所需的100％工作。必須重新輸入此信息才能按照您的建議擺脫我的電子郵件地址。 – user3368657

驗證輸入字段值是否爲0，則忽略

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